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Would you like to inspect the original subtitles? These are the user uploaded subtitles that are being translated: 1 00:00:09,105 --> 00:00:11,772 Narrator: On the german border... 2 00:00:12,274 --> 00:00:15,009 A forest of dark secrets. 3 00:00:24,286 --> 00:00:28,455 American gis called it the 'death factory.' 4 00:00:32,795 --> 00:00:34,361 World war ii was fought on 5 00:00:34,397 --> 00:00:37,998 Vast landscapes across the planet. 6 00:00:40,369 --> 00:00:42,703 Marty (over radio): Where we're going, we don't need roads. 7 00:00:43,539 --> 00:00:48,308 Narrator: But the evidence of that war is disappearing fast. 8 00:00:49,545 --> 00:00:52,980 Pete: That is one of the coolest things I've ever seen in the water! 9 00:00:53,783 --> 00:00:56,183 That's it. Congratulations. 10 00:00:57,620 --> 00:01:00,788 Narrator: Now, technology expert pete kelsey... 11 00:01:00,823 --> 00:01:02,623 Pete: I've gotta scan this. 12 00:01:02,658 --> 00:01:04,925 Narrator: And military historian marty morgan... 13 00:01:04,960 --> 00:01:07,094 Marty: Oh my god, look at this view! 14 00:01:07,129 --> 00:01:09,596 Narrator: Are using 21st century technology to 15 00:01:09,632 --> 00:01:11,698 Strip away the present and 16 00:01:11,767 --> 00:01:15,669 Reveal the buried secrets of world war ii. 17 00:01:17,807 --> 00:01:19,506 This time. 18 00:01:19,542 --> 00:01:22,943 Why was the hürtgen forest a death trap for the us army? 19 00:01:26,148 --> 00:01:28,782 How did the winter impede the us advance? 20 00:01:31,387 --> 00:01:34,788 Pete: So he's now losing heat really fast. 21 00:01:36,692 --> 00:01:40,327 Narrator: How did the nazis turn the forest itself into a weapon? 22 00:01:41,263 --> 00:01:43,664 Marty: Woah! 23 00:01:53,909 --> 00:01:56,977 Narrator: The hürtgen forest. 24 00:01:57,012 --> 00:02:02,950 Dense, dark, and today, eerily quiet. 25 00:02:05,421 --> 00:02:09,790 For 50 square miles, there's nothing but trees. 26 00:02:11,026 --> 00:02:14,027 Us military commanders expected to get through these 27 00:02:14,063 --> 00:02:17,498 Woods on their way to berlin, in a couple of weeks. 28 00:02:21,003 --> 00:02:25,739 Instead, through the fall and winter of 1944, it took six months, 29 00:02:28,310 --> 00:02:31,879 And cost tens of thousands of american lives. 30 00:02:34,350 --> 00:02:37,751 The battle of hürtgen forest is carved into history as 31 00:02:37,786 --> 00:02:40,187 America's bloodiest battle. 32 00:02:42,625 --> 00:02:44,458 Why? 33 00:02:44,493 --> 00:02:46,160 What happened here? 34 00:02:46,195 --> 00:02:49,263 What led the us army into this mire? 35 00:02:57,973 --> 00:03:01,675 The story begins in the summer of 1944. 36 00:03:03,846 --> 00:03:08,882 June 6th, british, canadian and us troops stormed the beaches of normandy. 37 00:03:18,360 --> 00:03:21,195 By early September they'd liberated paris, 38 00:03:21,230 --> 00:03:23,964 Most of northern France and belgium. 39 00:03:29,138 --> 00:03:31,838 Allied troops were racing to take germany. 40 00:03:39,582 --> 00:03:42,516 Marty: And that will all come to a grinding halt here, 41 00:03:42,551 --> 00:03:44,351 At the german border. 42 00:03:45,287 --> 00:03:47,654 Allied forces are going to be confronting german soldiers 43 00:03:47,690 --> 00:03:50,057 Fighting for german soil. 44 00:03:50,092 --> 00:03:51,625 And from this point forward, 45 00:03:51,660 --> 00:03:53,894 Things were only going to get worse. 46 00:03:57,199 --> 00:03:59,766 Narrator: Military historian marty morgan and tech wizard 47 00:03:59,802 --> 00:04:02,936 Pete kelsey have come to the hürtgen forest. 48 00:04:04,139 --> 00:04:07,574 They're looking for traces of an epic world war ii battle. 49 00:04:08,811 --> 00:04:10,810 They've set up their hq in a farmhouse, 50 00:04:10,813 --> 00:04:13,013 Near the edge of the forest. 51 00:04:16,885 --> 00:04:21,088 Pete wants to build a 3d virtual terrain map. 52 00:04:21,123 --> 00:04:23,890 He'll combine german government lidar scans, 53 00:04:23,926 --> 00:04:26,059 With more sophisticated aerial tech, 54 00:04:26,095 --> 00:04:28,695 To lift away the trees and ground cover. 55 00:04:33,035 --> 00:04:36,703 He hopes to reveal the scars of battle beneath. 56 00:04:39,508 --> 00:04:42,709 Pete: Let's bring it up, and look at that. 57 00:04:44,013 --> 00:04:46,313 Christoph: That is amazing isn't it. 58 00:04:46,348 --> 00:04:49,950 Narrator: Pete and marty are joined by professor christoph rass, 59 00:04:49,985 --> 00:04:52,386 A german military historian. 60 00:04:52,421 --> 00:04:55,088 He's studied the battle of hürtgen over many years. 61 00:04:57,026 --> 00:04:58,859 Christoph: You have the americans advancing from the 62 00:04:58,894 --> 00:05:02,863 West, and then as they get to the border of germany, 63 00:05:02,898 --> 00:05:05,699 They have the eifel mountains in front of them. 64 00:05:07,002 --> 00:05:09,136 Narrator: The eifel mountains block the way, 65 00:05:09,171 --> 00:05:11,305 Funneling them into a narrow valley, 66 00:05:11,340 --> 00:05:13,940 Known as the stolberg corridor. 67 00:05:14,710 --> 00:05:17,944 This is the direct route into germany. 68 00:05:17,980 --> 00:05:20,414 But to the south of the corridor lies the massive 69 00:05:20,449 --> 00:05:22,749 Hürtgen forest. 70 00:05:30,392 --> 00:05:33,360 American commanders realize the germans could hole-up in 71 00:05:33,395 --> 00:05:36,430 The forest, then attack the american flank. 72 00:05:40,402 --> 00:05:43,303 So on September 12th 1944, 73 00:05:43,339 --> 00:05:46,406 General cota sent in an advance party. 74 00:05:49,178 --> 00:05:53,714 6,000 men of the 28th infantry division marched on the forest. 75 00:05:54,950 --> 00:05:58,852 Their mission, to clear the germans out. 76 00:05:58,887 --> 00:06:01,288 Pete: So, in a sense the americans are walking in, 77 00:06:01,357 --> 00:06:04,858 Unknowingly walking in, to a heavily defended area 78 00:06:04,893 --> 00:06:06,727 That looks like that. 79 00:06:06,762 --> 00:06:08,895 Christoph: Yes, and it's an impossible choice. 80 00:06:08,931 --> 00:06:12,032 You have to secure it, you can't go around it. 81 00:06:12,067 --> 00:06:15,435 And then as you go in it, for a while you lose all of the 82 00:06:15,471 --> 00:06:17,104 Advantages you have. 83 00:06:17,139 --> 00:06:20,006 Pete: And it's, to me, it's pretty clear that this terrain 84 00:06:20,042 --> 00:06:24,277 Is going to make moving any heavy equipment all but impossible. 85 00:06:25,814 --> 00:06:27,848 Narrator: Lidar shows a man-made barrier, 86 00:06:27,883 --> 00:06:30,550 10 miles long. 87 00:06:30,586 --> 00:06:32,486 This confronted the advance party, 88 00:06:32,521 --> 00:06:34,855 Before they even reached the woods. 89 00:06:34,890 --> 00:06:37,190 Marty: Holy cow! 90 00:06:37,226 --> 00:06:38,959 Narrator: Could this explain the loss of 91 00:06:38,994 --> 00:06:41,528 Thousands of american soldiers? 92 00:06:42,464 --> 00:06:45,499 Pete and marty go to check it out. 93 00:07:02,418 --> 00:07:05,485 Marty: It's an incredible sight to see isn't it? 94 00:07:08,257 --> 00:07:12,058 Still here after almost eight decades. 95 00:07:12,861 --> 00:07:14,461 Pete: Unbelievable. 96 00:07:14,496 --> 00:07:17,764 It seems to go on for miles in both directions. 97 00:07:18,901 --> 00:07:21,301 Narrator: These square based pyramids of concrete 98 00:07:21,336 --> 00:07:24,337 Are called dragon's teeth. 99 00:07:24,373 --> 00:07:26,773 They were positioned to stop tanks and trucks, 100 00:07:26,809 --> 00:07:28,975 In their tracks. 101 00:07:31,246 --> 00:07:34,648 Pete: You'd come upon this and it's a bit intimidating! 102 00:07:37,085 --> 00:07:38,585 Marty: Right. 103 00:07:38,620 --> 00:07:41,288 This belt should be going miles to the north, 104 00:07:41,323 --> 00:07:43,089 And miles to the south. 105 00:07:43,125 --> 00:07:45,225 Narrator: These teeth were fiendishly simple, 106 00:07:45,260 --> 00:07:47,494 But precision made. 107 00:07:47,529 --> 00:07:50,497 How effective was this line of defense? 108 00:07:50,532 --> 00:07:52,966 Pete puts his tech to work, to find out. 109 00:07:54,503 --> 00:07:57,904 Pete: We really want to create a 3d model of the dragons teeth. 110 00:07:57,940 --> 00:08:01,708 So with me I have a tablet equipped with essentially 111 00:08:01,743 --> 00:08:05,378 A 3d handheld scanner. 112 00:08:05,414 --> 00:08:10,250 And as I move around using this device, 113 00:08:10,285 --> 00:08:15,489 In real time it's going to be capturing data in 3d as I go. 114 00:08:18,126 --> 00:08:21,995 Narrator: Pete's scanner bouncs infrared light off the teeth, 115 00:08:22,030 --> 00:08:24,464 To capture every detail. 116 00:08:32,274 --> 00:08:36,309 From there he can build a precise 3d virtual model and 117 00:08:36,345 --> 00:08:38,812 Demonstrate how they might have worked. 118 00:08:42,985 --> 00:08:45,585 Advancing tanks would quickly become stranded 119 00:08:45,621 --> 00:08:48,655 And vulnerable to enemy fire. 120 00:08:50,659 --> 00:08:53,660 Marty: What this wall does is it reduces a modern mechanized army, 121 00:08:53,695 --> 00:08:57,230 To a rabble of lightly armed infantrymen. 122 00:08:59,067 --> 00:09:02,669 Narrator: But pete and marty notice something strange. 123 00:09:04,406 --> 00:09:08,642 These teeth don't appear to have bitten hard steel. 124 00:09:08,677 --> 00:09:11,545 There are none of the scrapes and grazes that heavy armor 125 00:09:11,580 --> 00:09:14,848 Would leave on their surfaces. 126 00:09:15,284 --> 00:09:17,317 Marty: If engineers came here and wanted to blow a path 127 00:09:17,352 --> 00:09:19,719 Through this band of obstacles, 128 00:09:19,755 --> 00:09:23,390 That would be an enormous task that would take an enormous 129 00:09:23,425 --> 00:09:25,792 Quantity of explosives and it would take a lot of time. 130 00:09:25,827 --> 00:09:27,394 Pete: Sure. 131 00:09:27,429 --> 00:09:30,363 Narrator: Us army engineers improvised. 132 00:09:30,399 --> 00:09:32,299 They buried the teeth with earth, 133 00:09:32,367 --> 00:09:34,601 And easily passed over them. 134 00:09:36,238 --> 00:09:40,440 This line of defense, was monumentally ineffective. 135 00:09:42,411 --> 00:09:45,111 Nevertheless, by September 18th, 136 00:09:45,147 --> 00:09:47,380 Just five days into the battle, 137 00:09:47,416 --> 00:09:51,117 The 28th division had sustained 1,500 casualties 138 00:09:51,153 --> 00:09:54,254 And six days later withdrew to belgium. 139 00:09:57,593 --> 00:10:00,794 Now the 9th infantry division took up the fight. 140 00:10:00,829 --> 00:10:03,463 What kind of defenses would they encounter? 141 00:10:12,374 --> 00:10:12,906 Narrator: The dragon's teeth were only the first line 142 00:10:14,743 --> 00:10:17,410 Of defense on germany's western border. 143 00:10:19,381 --> 00:10:22,082 Marty morgan knows that they were part of a much more 144 00:10:22,117 --> 00:10:25,452 Complex defense system in the hürtgen forest. 145 00:10:26,722 --> 00:10:29,556 The germans called it 'the west wall'. 146 00:10:29,591 --> 00:10:32,325 The americans knew it as the 'siegfried line.' 147 00:10:34,129 --> 00:10:39,466 The us 9th division entered the forest on September 29th, 1944. 148 00:10:42,938 --> 00:10:47,540 They suffered 4,500 casualties in their first three weeks and 149 00:10:47,576 --> 00:10:50,543 Advanced less than two miles. 150 00:10:51,246 --> 00:10:53,980 They couldn't even see the german defenses. 151 00:11:00,589 --> 00:11:04,324 Pete and marty can't see those positions either. 152 00:11:04,359 --> 00:11:07,694 But maybe a high-fidelity scan will fix that. 153 00:11:14,703 --> 00:11:16,703 Pete: Harm! Harm: Hi pete. 154 00:11:16,738 --> 00:11:19,005 Pete: Oh, am I glad to see you. 155 00:11:20,075 --> 00:11:25,812 Look at this, a very, very impressive, very large drone. 156 00:11:26,915 --> 00:11:28,815 Basically, what this drone can do, 157 00:11:28,850 --> 00:11:33,586 Is get this very accurate laser-based unit into the air. 158 00:11:33,622 --> 00:11:38,091 This rather amazing piece of technology in a sense, 159 00:11:38,126 --> 00:11:42,028 Is going to make the invisible, visible. 160 00:11:42,731 --> 00:11:46,332 Harm: Back up, running. 161 00:11:50,505 --> 00:11:52,272 Pete: Wow! 162 00:11:56,211 --> 00:11:59,946 Narrator: This flying scanner is capturing finely detailed data, 163 00:11:59,981 --> 00:12:03,483 To augment pete's 3d terrain map. 164 00:12:03,518 --> 00:12:07,620 Lasers penetrate the tree canoy to record what lies beneath. 165 00:12:13,695 --> 00:12:16,863 Then, using advanced processing software, 166 00:12:16,898 --> 00:12:19,466 Pete can strip away the trees, 167 00:12:20,602 --> 00:12:23,737 To uncover hürtgen as never before. 168 00:12:26,007 --> 00:12:29,743 Back at hq, the results are impressive. 169 00:12:30,912 --> 00:12:34,647 Christoph: We have so far never seen lidar with such resolution. 170 00:12:35,884 --> 00:12:38,151 And look at the details you can see. 171 00:12:38,186 --> 00:12:41,020 Marty: Could those potentially be bunkers? 172 00:12:42,324 --> 00:12:44,891 Narrator: Only 3 miles from the dragons teeth, 173 00:12:44,926 --> 00:12:46,793 They've spotted something. 174 00:12:46,828 --> 00:12:49,996 It looks like an elaborate system of german bunkers. 175 00:12:51,066 --> 00:12:54,234 Pete: I've got the drone lidar loaded up, and look at this. 176 00:12:54,269 --> 00:12:56,369 Narrator: Armed with new scanning data, 177 00:12:56,404 --> 00:12:59,372 They're looking for these hidden defenses. 178 00:13:01,443 --> 00:13:03,710 Pete: Hey marty. Marty: You got something? 179 00:13:03,745 --> 00:13:05,678 Pete: Look at that. 180 00:13:05,714 --> 00:13:08,047 Marty: Oh yeah! Now we're talking. 181 00:13:08,083 --> 00:13:11,785 Pete: Right where it should be. 182 00:13:16,091 --> 00:13:17,657 Wow! Talk about high ground. 183 00:13:17,692 --> 00:13:19,592 Marty: Yeah. 184 00:13:19,628 --> 00:13:22,962 Pete: According to the lidar, this is the highest point in the area. 185 00:13:23,932 --> 00:13:26,666 Marty: It's got a commanding view down onto the road. 186 00:13:26,701 --> 00:13:28,401 Narrator: At the end of October, 187 00:13:28,436 --> 00:13:31,404 The 28th infantry return to the forest. 188 00:13:32,774 --> 00:13:36,876 Advancing through these trees is deadly. 189 00:13:36,912 --> 00:13:40,079 Pete: Whoa, look at that gun port looking right at us! 190 00:13:40,115 --> 00:13:44,317 Wow! Oh yeah. 191 00:13:45,520 --> 00:13:49,255 Yeah yeah yeah. This thing's intact. 192 00:13:50,859 --> 00:13:53,159 Marty: Wow standing water. 193 00:13:53,195 --> 00:13:56,362 That's a bit of a surprise considering how cold it is out here. 194 00:13:59,000 --> 00:14:01,034 Pete: Is it me, or does that pattern on that wall right 195 00:14:01,069 --> 00:14:05,572 There, look like somebody threw a grenade in here, 196 00:14:05,607 --> 00:14:08,741 And the fragmentation just went everywhere. 197 00:14:10,111 --> 00:14:13,746 Marty: You know, it does look a little bit like there are 198 00:14:13,782 --> 00:14:16,716 Some impacts on the side of that wall. 199 00:14:18,486 --> 00:14:20,620 Narrator: It must have been daunting to advance on a gun 200 00:14:20,655 --> 00:14:23,389 Emplacement like this. 201 00:14:23,425 --> 00:14:26,259 And the scan reveals that it's one of nine, 202 00:14:26,294 --> 00:14:29,295 In just this short stretch of the forest. 203 00:14:31,466 --> 00:14:34,234 The lidar clearly shows that the bunkers command 204 00:14:34,269 --> 00:14:37,270 Strategic high ground. 205 00:14:37,305 --> 00:14:40,139 They have interlocking fields of fire. 206 00:14:44,613 --> 00:14:46,746 Pete spots something odd. 207 00:14:46,781 --> 00:14:50,049 These bunkers don't seem heavily damaged. 208 00:14:50,085 --> 00:14:53,453 While others nearby are completely shattered. 209 00:15:05,867 --> 00:15:08,868 Pete: Clearly there's a lot of damage to this place. 210 00:15:08,904 --> 00:15:12,338 But what happened here? 211 00:15:13,375 --> 00:15:15,942 Was this part of some great battle? 212 00:15:16,811 --> 00:15:20,146 Was this an air strike? 213 00:15:24,653 --> 00:15:26,986 Narrator: Pete's gathering data for a 3d model of the 214 00:15:27,022 --> 00:15:29,455 German bunkers. 215 00:15:29,491 --> 00:15:33,126 He'll capture every bullet strike, crack and fracture, 216 00:15:33,161 --> 00:15:36,062 To learn how some were destroyed. 217 00:15:41,002 --> 00:15:44,003 Back at hq, he and marty are trying to work out why 218 00:15:44,039 --> 00:15:48,207 Some bunkers remain intact, while others are blown to smithereens. 219 00:15:50,178 --> 00:15:52,011 Pete: I've been looking at some of the scan data, 220 00:15:52,047 --> 00:15:54,480 From these demolished bunkers. 221 00:15:54,516 --> 00:15:57,784 On this first one, this roof slab, 222 00:15:57,819 --> 00:16:00,887 Which is at least three feet thick, maybe four, 223 00:16:00,922 --> 00:16:04,123 Has been split in two places. 224 00:16:05,360 --> 00:16:07,694 The walls on either side, specifically over here on the 225 00:16:07,729 --> 00:16:10,763 Right, you can actually see that it's bowed out. 226 00:16:10,799 --> 00:16:12,598 Marty: It's popped out, at that angle. 227 00:16:12,634 --> 00:16:14,901 Narrator: On close examination, 228 00:16:14,936 --> 00:16:17,470 Pete concludes that these smashed bunkers weren't 229 00:16:17,505 --> 00:16:20,740 Attacked from the outside. 230 00:16:20,775 --> 00:16:24,610 Pete: This is almost certainly an explosive charge from inside. 231 00:16:25,513 --> 00:16:28,815 There is no sign of an assault or pitched battle or anything 232 00:16:28,850 --> 00:16:32,719 On this bunker, so almost certainly post-war demolition. 233 00:16:34,322 --> 00:16:38,358 Narrator: So, just as us forces overcame the dragon's teeth, 234 00:16:38,393 --> 00:16:42,328 They also got past most of the bunkers on the siegfried line. 235 00:16:43,732 --> 00:16:46,399 Pete: If these bunkers weren't destroyed in battle, 236 00:16:46,434 --> 00:16:49,602 How in the world did the americans get past them? 237 00:16:49,637 --> 00:16:52,505 Marty: The siegfried line was presented as this impenetrable wall. 238 00:16:52,540 --> 00:16:55,541 And what we now know, is that it was not as much of 239 00:16:55,577 --> 00:16:59,212 A tough nut to crack as had been expected. 240 00:17:00,915 --> 00:17:03,883 Narrator: Marty thinks that american troops likely spotted the bunkers, 241 00:17:03,918 --> 00:17:08,221 And somehow got a small force around behind them, to attack. 242 00:17:09,391 --> 00:17:13,092 Marty: This structure was oriented towards the west, 243 00:17:13,128 --> 00:17:17,030 And instead our forces slip in on it from its blindside. 244 00:17:18,600 --> 00:17:20,700 Narrator: At some cost, the second line of german 245 00:17:20,735 --> 00:17:23,636 Defense is breached. 246 00:17:24,739 --> 00:17:27,573 But as the american army advance deeper into the 247 00:17:27,609 --> 00:17:30,843 Hürtgen forest; they come up against an obstacle more 248 00:17:30,879 --> 00:17:34,480 Fearsome than any man-made fortification. 249 00:17:35,884 --> 00:17:38,184 The forest itself. 250 00:17:42,557 --> 00:17:45,691 Narrator: October 1944. 251 00:17:46,494 --> 00:17:47,927 Us troops have breached the dragons teeth and they've 252 00:17:49,297 --> 00:17:52,465 Overcome a daunting system of concrete bunkers, 253 00:17:52,500 --> 00:17:54,901 In germany's siegfried line. 254 00:17:56,938 --> 00:18:00,106 But pete kelsey and marty morgan are looking deeper 255 00:18:00,141 --> 00:18:03,843 Into the forest for evidence of full-on battle. 256 00:18:05,513 --> 00:18:08,748 Something on the lidar has caught pete's attention. 257 00:18:10,018 --> 00:18:11,417 Pete: I thought you should have a look at this. 258 00:18:11,453 --> 00:18:12,718 What do you think? 259 00:18:12,754 --> 00:18:14,921 Marty: Definitely not german, no trenches. 260 00:18:14,956 --> 00:18:18,491 They look oblong, they don't look like shell craters. 261 00:18:18,526 --> 00:18:21,060 But then look at all of this behind them. 262 00:18:21,096 --> 00:18:23,796 Pete: Right, there's so many of them. 263 00:18:23,832 --> 00:18:26,499 Marty: Wow, there is something going on here. 264 00:18:26,534 --> 00:18:29,302 Narrator: These scars on the landscape are six miles beyond 265 00:18:29,337 --> 00:18:32,138 The dragon's teeth and two and a half miles east of the 266 00:18:32,173 --> 00:18:34,941 Concrete bunkers. 267 00:18:34,976 --> 00:18:37,910 Marty soon zeroes in on them. 268 00:18:37,946 --> 00:18:40,313 Marty: Huh. 269 00:18:44,652 --> 00:18:50,957 The lidar has collected this fascinating range of imagery of this site. 270 00:18:51,960 --> 00:18:56,329 And what I want to have a look at, is this big one here. 271 00:19:01,102 --> 00:19:05,138 Oh, look at this on the other side of this tree. 272 00:19:06,641 --> 00:19:10,510 That is a dug position, oh yeah. 273 00:19:12,647 --> 00:19:15,915 That's a fox hole. 274 00:19:17,085 --> 00:19:20,286 There are just positions absolutely everywhere, 275 00:19:20,321 --> 00:19:22,722 That's one right here. 276 00:19:23,591 --> 00:19:25,825 Foxhole. 277 00:19:27,562 --> 00:19:30,830 Foxhole over there. 278 00:19:34,068 --> 00:19:35,968 Man, this is something else. 279 00:19:37,639 --> 00:19:39,539 Narrator: This is the evidence pete and marty 280 00:19:39,574 --> 00:19:41,474 Have been searching for. 281 00:19:41,509 --> 00:19:43,442 Since their return to the forest, 282 00:19:43,478 --> 00:19:47,146 The 28th division had advanced rapidly over the siegfried lin. 283 00:19:48,683 --> 00:19:51,717 But right here, that stopped. 284 00:19:57,091 --> 00:20:00,226 The americans dug foxholes when they couldn't advance. 285 00:20:05,567 --> 00:20:08,834 And marty's found something even more significant. 286 00:20:14,609 --> 00:20:16,676 Marty: This is special. 287 00:20:16,711 --> 00:20:20,413 Obviously, this is a troop shelter, not a shell crater. 288 00:20:24,118 --> 00:20:26,419 Dug by americans during the battle of the hürtgen forest, 289 00:20:26,454 --> 00:20:28,721 75 years ago. 290 00:20:28,756 --> 00:20:31,791 This shelter position would have had logs over the top of it. 291 00:20:31,859 --> 00:20:34,627 It provided some measure of shelter and comfort, 292 00:20:34,662 --> 00:20:37,897 In a battle that was not known for providing many comforts. 293 00:20:39,667 --> 00:20:42,735 A position like this could have housed as many as 20 people. 294 00:20:42,770 --> 00:20:44,937 The size of it makes me think it was probably associated 295 00:20:44,973 --> 00:20:49,242 With maybe a communications center, maybe a battalion headquarters 296 00:20:49,277 --> 00:20:50,943 Or maybe a medical aid station. 297 00:20:50,979 --> 00:20:53,446 And if it wasn't for the lidar you'd never think for a second 298 00:20:53,481 --> 00:20:55,781 That anything was up here. 299 00:20:58,586 --> 00:21:02,054 Narrator: This was no temporary refuge. 300 00:21:02,090 --> 00:21:06,025 It was part of a complex of properly engineered dugouts. 301 00:21:07,629 --> 00:21:12,265 A whole battalion of 800 men hunkered down in this vicinity. 302 00:21:14,135 --> 00:21:17,970 The us army was getting bogged down in a static war of attrition. 303 00:21:22,176 --> 00:21:25,711 Even the trees seemed to be against them. 304 00:21:36,057 --> 00:21:39,258 Marty: The forest is as much of a character in this drama, 305 00:21:39,294 --> 00:21:41,861 As the two opposing sides that are confronting each other 306 00:21:41,896 --> 00:21:43,696 On the battlefield. 307 00:21:43,731 --> 00:21:46,699 And that's because the forest is the great equalizer. 308 00:21:46,734 --> 00:21:51,070 It creates circumstances where neither side can bring their 309 00:21:51,105 --> 00:21:54,106 Most powerful weapons to bear. 310 00:21:54,509 --> 00:21:56,542 The american military by this point, 311 00:21:56,577 --> 00:22:00,680 Is making extensive use of armor support, 312 00:22:00,715 --> 00:22:03,949 Tactical close air support and artillery support and yet the 313 00:22:03,985 --> 00:22:07,586 Hürtgen forest, strips those advantages away. 314 00:22:09,557 --> 00:22:12,591 Narrator: The hürtgen forest, planted a century earlier by 315 00:22:12,627 --> 00:22:15,928 The prussians, was a stout defense. 316 00:22:17,432 --> 00:22:21,701 Standing 100 feet high and set just 8 feet apart, 317 00:22:21,736 --> 00:22:25,004 The trees were a massive obstacle. 318 00:22:28,076 --> 00:22:30,042 Marty: And this is part of the reason why the battle of the 319 00:22:30,078 --> 00:22:33,079 Hürtgen forest descends into this stalemate where the 320 00:22:33,114 --> 00:22:36,882 Americans aren't able to make significant progress 321 00:22:36,918 --> 00:22:38,718 Across the battlefield. 322 00:22:38,753 --> 00:22:42,488 Because the battlefield is the forest and you are fighting that, 323 00:22:42,523 --> 00:22:45,725 As much as you are fighting the enemy that opposes you. 324 00:22:52,667 --> 00:22:54,400 Narrator: Aerial reconnaissance was also 325 00:22:54,435 --> 00:22:57,536 Obscured by tree cover. 326 00:22:57,572 --> 00:22:59,939 The troops were advancing blind, 327 00:22:59,974 --> 00:23:02,908 And without aerial support. 328 00:23:02,944 --> 00:23:07,513 After three weeks in the woods they'd suffered 4,500 casualties. 329 00:23:09,650 --> 00:23:12,718 There are some trails through the forest. 330 00:23:12,754 --> 00:23:14,920 The us army used them to send tanks, 331 00:23:14,956 --> 00:23:18,124 Trucks and artillery to the front line. 332 00:23:18,159 --> 00:23:20,960 But hardly any arrived. 333 00:23:24,532 --> 00:23:28,734 Pete's come to the kall trail to see if he can work out what happened. 334 00:23:30,838 --> 00:23:34,440 Pete: We've heard stories that there's actually a tank track 335 00:23:34,475 --> 00:23:39,678 Embedded in this trail and sure enough, here it is. 336 00:23:40,815 --> 00:23:42,515 And I've got to scan this. 337 00:23:42,550 --> 00:23:44,517 We have to scan this. 338 00:23:44,552 --> 00:23:47,686 What an amazing artifact. 339 00:23:49,724 --> 00:23:52,958 Wow, look at that. 340 00:23:54,262 --> 00:23:58,664 Yeah, that's pretty amazing. 341 00:23:58,699 --> 00:24:01,300 That's got to be 20 feet, probably more. 342 00:24:01,335 --> 00:24:05,237 Narrator: Pete sets to work with his static scanner. 343 00:24:05,940 --> 00:24:09,809 He wants to build a 3d virtual model of the tank track. 344 00:24:16,017 --> 00:24:19,552 Maybe it'll explain why the world's best equipped army 345 00:24:19,587 --> 00:24:22,488 Had to fight without its most powerful weapons? 346 00:24:27,895 --> 00:24:30,129 Narrator: Back at hq, pete kelsey is examining 347 00:24:30,164 --> 00:24:33,065 A 3d virtual model of the old tank track. 348 00:24:34,268 --> 00:24:34,934 There's something strange about it. 349 00:24:37,205 --> 00:24:40,506 It's a big piece of equipment to leave lying around. 350 00:24:43,511 --> 00:24:44,944 Pete: Marty have a look at this. 351 00:24:44,979 --> 00:24:46,779 I was doing some scanning up on the kall trail and 352 00:24:46,814 --> 00:24:50,082 Look what is in the middle of the road. 353 00:24:51,085 --> 00:24:52,551 Marty: Well, well, that appears to be 354 00:24:52,587 --> 00:24:55,621 A section of track from a sherman tank. 355 00:24:55,990 --> 00:24:59,225 Ok, I'm not thinking that this is from a mine because the 356 00:24:59,260 --> 00:25:01,460 Tracks don't appear to be damaged. 357 00:25:01,496 --> 00:25:05,264 And then also, they are belly up. 358 00:25:05,299 --> 00:25:07,666 So, what we are seeing is actually the surface that 359 00:25:07,702 --> 00:25:09,635 Would be in contact with the road. 360 00:25:09,670 --> 00:25:13,239 Narrator: If it's upside down, it hasn't just come adrift. 361 00:25:13,274 --> 00:25:15,307 So, it's a puzzle. 362 00:25:16,811 --> 00:25:18,477 Marty: You said it was at a bend, didn't you? 363 00:25:18,513 --> 00:25:19,678 Pete: That's right. 364 00:25:19,714 --> 00:25:22,081 Marty: Yeah. Was it uphill? Downhill? 365 00:25:22,116 --> 00:25:25,751 Pete: It was on a very marked slope, uphill. 366 00:25:25,786 --> 00:25:27,319 Marty: Yeah. 367 00:25:27,355 --> 00:25:29,555 I bet you they put this here, to provide traction for 368 00:25:29,590 --> 00:25:31,123 Vehicles trying to climb the kall trail. 369 00:25:31,158 --> 00:25:32,758 Pete: Really? 370 00:25:32,793 --> 00:25:34,660 And that would explain why they are upside down, 371 00:25:34,695 --> 00:25:37,162 In a perfectly straight line going up the grade! 372 00:25:37,198 --> 00:25:38,864 Marty: That would explain it. 373 00:25:38,900 --> 00:25:41,133 So, you have some spare parts lying around, you have a need, 374 00:25:41,168 --> 00:25:43,502 You make it happen. 375 00:25:45,006 --> 00:25:47,439 Narrator: Marty and pete have proof that heavy equipment 376 00:25:47,475 --> 00:25:50,676 Struggled on these narrow trails. 377 00:25:53,581 --> 00:25:57,783 When a tank got stuck, it became a 30 ton roadblock. 378 00:25:59,754 --> 00:26:03,522 Whole convoys would be vulnerable to enemy ambush. 379 00:26:07,128 --> 00:26:11,030 The us army was forced to improvise. 380 00:26:11,065 --> 00:26:14,466 The tank track was their ingenious solution. 381 00:26:16,938 --> 00:26:20,039 But even these difficulties can't account for the terrible 382 00:26:20,074 --> 00:26:23,609 Death toll suffered in the battle for hürtgen forest. 383 00:26:26,147 --> 00:26:30,783 Marty suspects the most lethal enemy is all around them, 384 00:26:32,954 --> 00:26:36,288 Hiding in plain sight. 385 00:26:44,799 --> 00:26:46,932 To test his theory, marty is meeting with 386 00:26:46,968 --> 00:26:49,735 Explosives expert, trevor lawrence. 387 00:26:55,776 --> 00:26:59,445 Trevor: Okay marty, so there's your second world war mortar bomb. 388 00:26:59,480 --> 00:27:00,646 Marty: Nice, 3 inch? 389 00:27:00,681 --> 00:27:02,881 Trevor: It is. Marty: Excellent. 390 00:27:02,917 --> 00:27:04,083 Inert I hope? 391 00:27:04,118 --> 00:27:06,118 Trevor: Yeah, it certainly is. 392 00:27:06,153 --> 00:27:08,220 Narrator: Marty's theory is based on the difference between 393 00:27:08,255 --> 00:27:11,390 A conventional mortar and a super quick fused mortar. 394 00:27:13,561 --> 00:27:15,894 The conventional mortar explodes on impact with the 395 00:27:15,930 --> 00:27:19,798 Ground, and some of its force is absorbed by the earth. 396 00:27:22,970 --> 00:27:25,871 But a mortar with a super quick fuse, 397 00:27:25,906 --> 00:27:28,874 Coming down in a forest, is brutally different. 398 00:27:35,416 --> 00:27:37,149 Marty: It all comes down to this. 399 00:27:37,184 --> 00:27:39,084 This very simple weapons system, 400 00:27:39,120 --> 00:27:41,754 Of mortar tube plus mortar bomb. 401 00:27:43,491 --> 00:27:46,358 As the mortar bomb descended down toward a target in a 402 00:27:46,394 --> 00:27:49,928 Heavily forested area, branches of trees could come 403 00:27:49,964 --> 00:27:52,831 Into contact with this simple point-detonating fuse and that 404 00:27:52,867 --> 00:27:55,534 Would set the round off well above the ground. 405 00:27:58,806 --> 00:28:02,574 Narrator: To demonstrate what happens when a mortar explodes overhead, 406 00:28:02,610 --> 00:28:05,511 Trevor has prepared a powerful experiment. 407 00:28:06,947 --> 00:28:09,314 Trevor: Ok so, what we're gonna do here is try and replicate 408 00:28:09,350 --> 00:28:12,418 What we saw in the forest, in the second world war. 409 00:28:12,453 --> 00:28:15,320 So, we've built this scaffolding structure and 410 00:28:15,356 --> 00:28:18,023 Across here we've put these thick pine boards, 411 00:28:18,059 --> 00:28:20,359 Which are similar in a way to the branches. 412 00:28:20,394 --> 00:28:22,261 Marty: So, you can simulate basically, 413 00:28:22,296 --> 00:28:24,863 What this would have done on impact. 414 00:28:24,899 --> 00:28:26,365 Trevor: Absolutely, and what we are going to do is use one 415 00:28:26,400 --> 00:28:29,535 Of these, which is if you look, quite similar. 416 00:28:29,570 --> 00:28:32,638 So it's a very similar sort of metal, very brittle cast iron, 417 00:28:32,673 --> 00:28:35,140 And we are going to fill that with explosive exactly the same 418 00:28:35,176 --> 00:28:38,510 As would be inside here and detonate it up in the canopy. 419 00:28:39,714 --> 00:28:41,814 Narrator: They'll use an ultra-high-speed camera, 420 00:28:41,849 --> 00:28:44,316 To film what happens. 421 00:28:50,825 --> 00:28:53,659 Marty: This is a camera capable of a high motion capture rate, 422 00:28:53,694 --> 00:28:56,762 And what that means is that when we record the explosion, 423 00:28:56,797 --> 00:28:59,798 We can slow it down to this very elegant slow motion. 424 00:28:59,834 --> 00:29:02,000 Narrator: All personnel withdraw to a bunker, 425 00:29:02,036 --> 00:29:04,503 As trevor prepares for detonation. 426 00:29:07,074 --> 00:29:08,507 Marty: Are we ready out there? 427 00:29:08,542 --> 00:29:10,943 Trevor: We are all good to go. 428 00:29:13,881 --> 00:29:15,547 Confirm range clear. 429 00:29:15,583 --> 00:29:17,116 Man (over radio): Confirm range clear. 430 00:29:17,151 --> 00:29:18,317 Trevor: Roger, range clear. 431 00:29:18,352 --> 00:29:20,285 Standby. 432 00:29:21,555 --> 00:29:26,658 Firing in 3, 2, 1, firing. 433 00:29:27,762 --> 00:29:30,062 (explosion). 434 00:29:32,466 --> 00:29:35,234 Marty: Woah, I felt that in my chest. 435 00:29:36,203 --> 00:29:37,302 Wow! 436 00:29:39,006 --> 00:29:41,707 Narrator: The ultra-high-speed camera captures every detail 437 00:29:41,742 --> 00:29:44,209 As the mortar explodes. 438 00:29:46,346 --> 00:29:49,982 First there's a blast wave, this alone can be lethal. 439 00:29:52,153 --> 00:29:54,453 Then the mortar shatters, 440 00:29:54,522 --> 00:29:57,756 And shards of hot shrapnel burst out. 441 00:29:57,792 --> 00:30:00,292 Finally, the tree branches shatter, 442 00:30:00,327 --> 00:30:03,462 Creating a hail of deadly debris. 443 00:30:06,700 --> 00:30:10,068 An overhead blast is utterly devastating. 444 00:30:11,405 --> 00:30:14,706 Gis below had no real defense. 445 00:30:15,643 --> 00:30:18,043 Marty: Oh my god, look at this. 446 00:30:18,078 --> 00:30:20,479 The aluminum sheets really took it on the nose! 447 00:30:20,514 --> 00:30:23,482 That sheet's even worse than this sheet. 448 00:30:23,517 --> 00:30:26,885 That's just plain vicious, look at that. 449 00:30:26,921 --> 00:30:30,022 Trevor: Look here, we've gone right through the scaffolding. 450 00:30:30,057 --> 00:30:31,557 Marty: Oh my god, yeah. 451 00:30:31,592 --> 00:30:33,525 Straight through it. 452 00:30:33,561 --> 00:30:36,562 Those fragments sliced the steel pipe, like that. 453 00:30:36,597 --> 00:30:39,565 They'd go right through the people beneath it. 454 00:30:43,838 --> 00:30:45,804 If you had a larger mortar concentration coming in on a 455 00:30:45,840 --> 00:30:48,607 Platoon that was dug in, you could wipe out everybody. 456 00:30:48,642 --> 00:30:51,009 Trevor: Absolutely, and 30 men dug into a position, 457 00:30:51,045 --> 00:30:54,613 Almost everybody would be either dead or injured. 458 00:30:56,050 --> 00:30:59,685 These air burst mortars, digging in is no protection from them. 459 00:31:02,923 --> 00:31:07,025 Narrator: This is what stopped the americans in hürtgen fores. 460 00:31:07,061 --> 00:31:10,062 It's called a tree burst. 461 00:31:12,499 --> 00:31:15,801 Thousands of us soldiers die this way. 462 00:31:25,913 --> 00:31:28,647 It's crushing for morale. 463 00:31:28,716 --> 00:31:32,150 Soldiers know they face death at any moment. 464 00:31:32,186 --> 00:31:35,721 Foxholes offer no protection. 465 00:31:37,524 --> 00:31:40,492 And to make matters worse, it's November. 466 00:31:40,527 --> 00:31:44,062 A wet fall is becoming a bitter winter. 467 00:31:50,271 --> 00:31:52,804 Narrator: 50 square miles of forest, 468 00:31:52,840 --> 00:31:55,340 The hürtgen was treacherous territory. 469 00:31:59,013 --> 00:32:05,183 (gunfire, explosions). 470 00:32:05,219 --> 00:32:07,686 After three months of fierce fighting, 471 00:32:07,721 --> 00:32:10,956 The us army was bogged down, stuck. 472 00:32:12,660 --> 00:32:16,728 And the winter of 1944 was exceptionally cold. 473 00:32:18,799 --> 00:32:20,599 Marty: This is January. 474 00:32:20,634 --> 00:32:24,469 This gives at least a strong impression of the actual time 475 00:32:24,505 --> 00:32:27,205 Period of the battle of the hürtgen forest, 476 00:32:27,241 --> 00:32:31,543 And it gives you the visceral impression of what it's like 477 00:32:31,578 --> 00:32:36,014 To be here in winter time, because it's cold! 478 00:32:38,619 --> 00:32:40,986 Narrator: The us army was reputedly the best equipped 479 00:32:41,021 --> 00:32:43,588 Fighting force in the world. 480 00:32:43,624 --> 00:32:47,192 So, how would they fare in a german winter? 481 00:32:48,762 --> 00:32:52,064 To find out, marty morgan and pete kelsey are conducting 482 00:32:52,099 --> 00:32:55,667 Some tests with local re-enactor, michel zeimet. 483 00:32:56,870 --> 00:32:58,870 Marty: The american soldiers that fight this battle, they, 484 00:32:58,906 --> 00:33:02,207 They, they bring uniforms, weapons and equipment that we 485 00:33:02,242 --> 00:33:04,776 Have available here, because michel has brought it. 486 00:33:04,812 --> 00:33:07,813 And, not all of it was ideal for the type of environment 487 00:33:07,848 --> 00:33:10,182 That the hürtgen forest provided. 488 00:33:11,919 --> 00:33:14,820 Narrator: Trialling world war ii standard issue kit, 489 00:33:14,855 --> 00:33:17,389 May prove revealing. 490 00:33:18,559 --> 00:33:20,258 Marty: Which jacket are you wearing, michel? 491 00:33:20,294 --> 00:33:21,994 Michel: I'm wearing the meccano jacket, 492 00:33:22,029 --> 00:33:24,930 Which was some sort of coat. 493 00:33:24,965 --> 00:33:29,735 It's not very great for cold weather but it's already 494 00:33:29,770 --> 00:33:32,137 Something, I would say. 495 00:33:32,172 --> 00:33:34,706 Narrator: Many of the soldiers are still wearing the uniforms 496 00:33:34,742 --> 00:33:37,242 Issued to them in the summer. 497 00:33:37,277 --> 00:33:39,945 They're forced to improvise. 498 00:33:39,980 --> 00:33:41,546 Marty: Here's a look that you often see in the battle of the 499 00:33:41,582 --> 00:33:44,616 Hürtgen forest where they have put on the gas mask cape and 500 00:33:44,651 --> 00:33:46,785 Then they throw the helmet on, on top of that. 501 00:33:46,820 --> 00:33:50,088 And so, the gas mask cape is not intended as a piece of 502 00:33:50,124 --> 00:33:54,693 Cold weather gear and it's being adaptively used as that. 503 00:33:55,896 --> 00:33:57,629 Now that we've got all the gear on, 504 00:33:57,664 --> 00:34:01,066 I'm thinking of an experiment that we can conduct. 505 00:34:01,101 --> 00:34:03,602 Pete, do you have that thermal imaging detector? 506 00:34:03,637 --> 00:34:06,004 Pete: I do. 507 00:34:07,608 --> 00:34:10,842 Narrator: Pete applies the latest thermal imaging technology, 508 00:34:10,878 --> 00:34:14,646 To see how these clothes perform in cold conditions. 509 00:34:14,681 --> 00:34:16,248 Pete: Let's have a look. 510 00:34:16,283 --> 00:34:20,786 So, what you're looking at, what's bright, 511 00:34:20,821 --> 00:34:24,589 Is where heat is being lost. 512 00:34:24,625 --> 00:34:27,859 The poor gi is suffering. 513 00:34:29,196 --> 00:34:30,896 Michel is cold. 514 00:34:30,931 --> 00:34:32,864 You don't even have to tell me you're cold, you're cold! 515 00:34:32,900 --> 00:34:34,933 Michel: I won't lie! 516 00:34:36,503 --> 00:34:39,471 Narrator: This bright image proves that after just minutes, 517 00:34:39,506 --> 00:34:43,909 An american gi would have been losing critical body heat in this uniform. 518 00:34:45,846 --> 00:34:50,615 Pete: Whereas, over to marty who's wearing 21st century 519 00:34:50,651 --> 00:34:53,251 Synthetics and goose down, 520 00:34:53,287 --> 00:34:57,622 You can see how his core is much darker, 521 00:34:57,658 --> 00:35:02,561 Which means warmer, which means marty is not losing heat. 522 00:35:04,898 --> 00:35:08,400 Narrator: And it's not just the body's core that suffers. 523 00:35:08,435 --> 00:35:10,836 If a soldier's feet get cold and wet, 524 00:35:10,871 --> 00:35:14,072 Trench foot becomes a deadly threat. 525 00:35:14,908 --> 00:35:19,678 Pete: I'm going to take a wild guess that michel's feet are 526 00:35:19,746 --> 00:35:23,148 Probably pretty uncomfortable. 527 00:35:23,183 --> 00:35:26,918 Leather boots, which were probably perpetually wet. 528 00:35:28,122 --> 00:35:30,722 Narrator: But many soldiers didn't even have the basic 529 00:35:30,757 --> 00:35:33,258 Equipment that michel is wearing. 530 00:35:33,293 --> 00:35:36,761 Standard issue meccano trench coats were in short supply, 531 00:35:36,797 --> 00:35:39,631 Many never got them. 532 00:35:39,666 --> 00:35:41,466 Marty: Here's the real test, let's see what it would look 533 00:35:41,502 --> 00:35:43,568 Like if he was equipped like a lot of guys were, 534 00:35:43,604 --> 00:35:45,036 And that is without the meccano. 535 00:35:45,072 --> 00:35:47,439 Can you take it off? 536 00:35:49,143 --> 00:35:52,177 Pete: So, he's now losing heat really fast. 537 00:35:53,514 --> 00:35:55,747 Marty: In so many of the period photos this is what you 538 00:35:55,782 --> 00:35:58,517 See them wearing in the hürtgen forest and that 539 00:35:58,552 --> 00:36:01,786 Garment's just not up to the task, it's too lightweight. 540 00:36:02,422 --> 00:36:05,690 Pete: And of course, if we were looking at a poor gi in a 541 00:36:05,726 --> 00:36:08,727 Foxhole, he's going to be soaking wet. 542 00:36:08,762 --> 00:36:12,964 So, michel's thermal signature would be dramatically 543 00:36:13,000 --> 00:36:15,800 Different if he was wet. 544 00:36:18,005 --> 00:36:20,372 Narrator: Ill equipped for freezing conditions, 545 00:36:20,407 --> 00:36:23,308 American troops paid a high price. 546 00:36:23,343 --> 00:36:27,512 It's estimated that 70,000 us soldiers suffered injuries 547 00:36:27,548 --> 00:36:32,450 Caused by that harsh winter in the hürtgen forest. 548 00:36:32,486 --> 00:36:35,153 Trench foot and hypothermia did more damage than the 549 00:36:35,189 --> 00:36:38,390 Dragon's teeth or the bunkers. 550 00:36:38,425 --> 00:36:41,693 And all the while, the german army fought ferociously in 551 00:36:41,728 --> 00:36:43,862 Defense of the fatherland. 552 00:36:57,311 --> 00:37:00,845 Narrator: December of 1944 in the hürtgen forest. 553 00:37:01,515 --> 00:37:04,416 The freezing conditions and the tree-burst mortar fire are 554 00:37:04,451 --> 00:37:07,919 Taking a terrible toll on the american forces. 555 00:37:10,290 --> 00:37:13,525 But where are the german mortar rounds coming from? 556 00:37:13,560 --> 00:37:16,695 Have the german infantry built further defenses, 557 00:37:16,730 --> 00:37:19,130 Beyond the siegfried line? 558 00:37:20,734 --> 00:37:23,001 The lidar looks blank, 559 00:37:23,036 --> 00:37:26,137 Except for some faint, twisting lines. 560 00:37:26,173 --> 00:37:28,840 They seem to stretch for miles and they're pockmarked with 561 00:37:28,875 --> 00:37:31,776 Shell craters. 562 00:37:31,812 --> 00:37:35,413 They're less than five miles ahead of the us foxholes. 563 00:37:36,416 --> 00:37:39,417 Marty and christoph go to investigate. 564 00:37:39,720 --> 00:37:41,720 Marty: What do you think, we're about 50 meters from it? 565 00:37:41,755 --> 00:37:45,457 Christoph: Yah, if we draw a line from the wood, 566 00:37:45,492 --> 00:37:47,325 We should see it. 567 00:37:47,361 --> 00:37:49,761 Marty: Oh yeah, I see it. Oh god look at that! 568 00:37:50,497 --> 00:37:52,664 It's clearly visible. 569 00:37:52,699 --> 00:37:54,833 I expected it to be overgrown but it's not. 570 00:37:54,868 --> 00:37:56,968 Christoph: No, see. Starts from here. 571 00:37:57,004 --> 00:37:58,570 Marty: Oh yeah. Look at it, right here. 572 00:37:58,605 --> 00:38:00,438 Oh wow, this is incredible. 573 00:38:00,474 --> 00:38:02,340 Christoph: Yup. 574 00:38:02,376 --> 00:38:07,746 We could now basically follow it for 10 kilometers. 575 00:38:07,781 --> 00:38:09,047 Marty: Is it that long? Christoph: Yes. 576 00:38:09,082 --> 00:38:10,649 Marty: Uninterrupted? Really? Christoph: Yes, yeah. 577 00:38:10,684 --> 00:38:12,851 Marty: My gosh. 578 00:38:14,154 --> 00:38:16,588 Narrator: The dragons teeth, the bunkers, 579 00:38:16,623 --> 00:38:19,658 Now this third line of defense. 580 00:38:19,693 --> 00:38:22,861 The german strategy was 'defense in depth'. 581 00:38:23,597 --> 00:38:26,097 Instead of relying on a single line of defense, 582 00:38:26,133 --> 00:38:28,300 They were prepared to retreat from one line, 583 00:38:28,335 --> 00:38:31,503 Only to create another line a few miles behind. 584 00:38:32,939 --> 00:38:34,873 Christoph: When they built this trench, 585 00:38:34,908 --> 00:38:37,876 The west wall has already been breached. 586 00:38:37,911 --> 00:38:41,980 So, they lost what they think of as their most powerful line of defense. 587 00:38:42,516 --> 00:38:43,948 Marty: And it falls to this. 588 00:38:43,984 --> 00:38:45,483 Christoph: Then it falls to this. 589 00:38:45,519 --> 00:38:47,585 Marty: They dug trenches in the woods. 590 00:38:48,221 --> 00:38:51,389 Christoph: The americans have to fight for every inch of the way. 591 00:38:51,958 --> 00:38:53,992 Narrator: This 'defense in depth', 592 00:38:54,027 --> 00:38:57,062 Enabled the germans to counter every american advance. 593 00:39:00,801 --> 00:39:03,968 Us forces still haven't achieved the decisive 594 00:39:04,004 --> 00:39:06,604 Breakthrough they'd hoped for. 595 00:39:06,640 --> 00:39:10,542 But by mid-December 1944 the tide is turning. 596 00:39:11,478 --> 00:39:14,279 Marty: This trench line really is a metaphor about the different 597 00:39:14,314 --> 00:39:16,915 Situations that the germans and the americans were in. 598 00:39:18,318 --> 00:39:20,452 Narrator: These german positions are little more than 599 00:39:20,487 --> 00:39:22,620 Hastily dug scrapings. 600 00:39:22,656 --> 00:39:24,789 No concrete defenses here. 601 00:39:26,326 --> 00:39:29,994 After many months of guerrilla warfare, they are desperate. 602 00:39:31,031 --> 00:39:33,932 Was this the site of fierce fighting? 603 00:39:37,537 --> 00:39:40,805 21st century tech may have an answer. 604 00:39:40,841 --> 00:39:43,208 Pete: And we're hoping that the answer lies with our 605 00:39:43,243 --> 00:39:47,045 Friend andreas here, who happens to have the ideal 606 00:39:47,080 --> 00:39:50,248 Piece of kit for this, which is a magnetometer. 607 00:39:50,884 --> 00:39:53,685 And between the two sensors it can pick up variations in the 608 00:39:53,720 --> 00:39:56,588 Earth's magnetic field. 609 00:39:57,724 --> 00:40:00,859 Narrator: Andreas scans the ground. 610 00:40:00,894 --> 00:40:04,929 The magnetometer can detect disturbances caused by intense heat. 611 00:40:07,601 --> 00:40:09,801 Pete: Oh, look at that. 612 00:40:09,836 --> 00:40:11,970 Those jump right out at you. 613 00:40:12,005 --> 00:40:13,838 Andreas: Those are two really, really big ones here. 614 00:40:13,874 --> 00:40:15,840 Christoph: These are not caused by agriculture. 615 00:40:15,876 --> 00:40:18,576 That means we had a chemical fire there of 616 00:40:18,612 --> 00:40:21,212 1,000 degrees or higher. A very, very strong fire. 617 00:40:21,248 --> 00:40:23,047 Pete: So probably ammunition burning. 618 00:40:23,083 --> 00:40:24,616 Christoph: Yeah. 619 00:40:28,321 --> 00:40:31,055 Andreas: Well, we don't really see a trench, not a structure, 620 00:40:31,091 --> 00:40:32,624 Not a linear structure. 621 00:40:32,659 --> 00:40:34,192 Christoph: If you look at these anomalies, 622 00:40:34,227 --> 00:40:36,461 The black ones, without the white rim. 623 00:40:36,496 --> 00:40:39,497 These are usually man-made holes. 624 00:40:39,533 --> 00:40:42,801 The earth has been shifted. Somebody dug a hole there. 625 00:40:43,637 --> 00:40:45,403 Pete: There's so many of them. Christoph: Yes. 626 00:40:45,439 --> 00:40:47,338 We're standing on a green pasture, 627 00:40:47,374 --> 00:40:50,008 Underneath you have the war still present. 628 00:40:50,043 --> 00:40:52,210 Pete: It's amazing. 629 00:40:52,245 --> 00:40:54,012 Narrator: And there's more. 630 00:40:54,047 --> 00:40:57,048 Lukas has been over the area with a metal detector. 631 00:40:57,784 --> 00:41:00,885 Lukas: We found a container for a german gas mask. 632 00:41:01,455 --> 00:41:04,022 Narrator: The gas mask is evidence of battle. 633 00:41:04,925 --> 00:41:07,692 And it holds a grisly secret. 634 00:41:08,929 --> 00:41:10,929 Blatt: This is a very nice find. 635 00:41:10,964 --> 00:41:14,132 It's a canteen bottle, maybe from a german soldier. 636 00:41:15,001 --> 00:41:17,969 And we see here the bullet. 637 00:41:18,004 --> 00:41:21,105 And here it is going inside, and there it is going outside. 638 00:41:21,141 --> 00:41:24,409 Narrator: This battlefield of shallow scrapes and relics, 639 00:41:24,444 --> 00:41:28,613 Is evidence of german desperation and a 'last ditch' mentality. 640 00:41:30,250 --> 00:41:34,319 And wave after wave of american infantry keep coming. 641 00:41:34,354 --> 00:41:37,088 Marty: We keep pouring humanity into that battle. 642 00:41:37,123 --> 00:41:40,425 We keep pouring divisions that get so hopelessly banged up, 643 00:41:40,460 --> 00:41:44,229 That they have to go somewhere to repair themselves after the hürtgen. 644 00:41:44,264 --> 00:41:47,065 That was the cost of the battle of the hürtgen forest. 645 00:41:47,100 --> 00:41:51,436 It just, it took in humanity and it spit out what was left. 646 00:41:52,072 --> 00:41:53,538 This was one of the toughest battles the american military 647 00:41:53,573 --> 00:41:55,907 Fights in the second world war. 648 00:41:57,143 --> 00:42:00,745 Narrator: Small wonder that many didn't make it out alive. 649 00:42:04,718 --> 00:42:08,319 In a sense, the whole of the battle of hürtgen forest was 650 00:42:08,355 --> 00:42:10,889 Part of 'defense in depth'. 651 00:42:12,259 --> 00:42:16,561 Because behind german lines, hitler was amassing a huge 652 00:42:16,596 --> 00:42:20,465 Force of troops and tanks, for a massive surprise attack. 653 00:42:23,069 --> 00:42:26,404 On December 16th they would crash through the american lin, 654 00:42:26,439 --> 00:42:28,706 To start a new fight. 655 00:42:32,479 --> 00:42:35,747 'the battle of the bulge' was hitler's last desperate bid 656 00:42:35,782 --> 00:42:38,816 To defend the fatherland. 657 00:42:39,486 --> 00:42:41,619 But the german army was overstretched, 658 00:42:41,655 --> 00:42:44,188 And the offensive failed. 659 00:42:44,224 --> 00:42:47,392 By February 1945, 660 00:42:47,427 --> 00:42:49,427 The americans were out of the woods and 661 00:42:49,462 --> 00:42:52,196 Across the ruhr river, heading for berlin. 662 00:43:00,507 --> 00:43:05,710 The battle of hürtgen forest cost almost 30,000 american lives 663 00:43:05,745 --> 00:43:08,746 But critically weakened the german army. 664 00:43:09,449 --> 00:43:12,417 It played a vital part in the eventual defeat of hitler, 665 00:43:12,452 --> 00:43:15,153 In may 1945. 666 00:43:16,890 --> 00:43:21,693 Sadly, even after the war, the forest went on killing. 667 00:43:23,029 --> 00:43:25,830 Marty: There's an extra level of sadness to this cemetery. 668 00:43:25,865 --> 00:43:30,435 Because here you have buried 3,001 victims of the hürtgen forest, 669 00:43:32,038 --> 00:43:36,608 Mostly german combatants but also 35 german civilians, 670 00:43:36,643 --> 00:43:41,713 Russians, belgians, and even 100 men who lost their lives 671 00:43:41,748 --> 00:43:44,816 Here after the war ended, attempting to clear all of the 672 00:43:44,851 --> 00:43:47,552 Unexploded ordinance that was left behind. 673 00:43:48,888 --> 00:43:51,923 So, the hürtgen forest was even claiming lives, 674 00:43:51,958 --> 00:43:55,093 After the end of world war ii and that somehow makes this 675 00:43:55,128 --> 00:43:57,895 Place seem all the more tragic. 676 00:44:08,875 --> 00:44:10,074 Captioned by cotter captioning services. 61702

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