Everything You Need to Know About the Great Wall of China

As many as 300,000 workers died during the construction. Many were buried within the wall itself.

 

The Great Wall was vital to military communication. Messages were relayed by smoke signals, lanterns and beacon fires.

 

But the wall never succeeded in keeping out the barbarians. In 1211 AD, Genghis Khan invaded and conquered China.

 

Over the centuries, sections of the Great Wall have deteriorated or been dismantled.