In March 1974, a group of peasants digging a well in northwest China unearthed fragments of a clay figure—the first evidence of what would turn out to be one of the greatest archaeological discoveries of modern times.

Built over 2,000 years ago, the terracotta army was constructed to protect the mausoleum of Qin Shi Huang, the first emperor to unify China. Made up of over 8,000 soldiers, 500 horses, chariots, archers and cavalrymen, this extraordinary UNESCO World Heritage site is shrouded in mystery.

In this groundbreaking documentary, discover the secrets behind the world's most mysterious ancient army.