The 3,600m Mountain Fortress That Defied 60,000 Soldiers! 😱 | Ancient Engineering#shortvideo #facts

Built at an incredible altitude of 3,600 meters, this ancient fortress had a mountain path barely 1–2 meters wide! ⛰️ With cliffs surrounding it, even a huge army struggled to attack. But in 748 AD, an army of 60,000 soldiers finally launched a massive assault. What happened next? 😱 #Shorts #AncientEngineering #AncientChina #History #Engineering #Architecture #HistoryFacts #ChinaHistory #AmazingFacts #HistoryShorts ---------------------------------------------------------------------------------------------------This video is for educational and informational purposes only. Copyright belongs to the respective owners. Fair Use under Section 107 of the Copyright Act. If you have any concerns, please contact us before taking any action.