The Army of Terracotta Warriors. Under a few cubic meters of red sand, they found 7000 terracotta warriors standing guard next to the mausoleum of Emperor Qin Shi Huang. The First Emperor made history with the achievement of having unified China. He began to reign at the age of 13 years and their mandate did not go unnoticed. Some of his feats were winning six major kingdoms, unifying measures, the currency and writing, building many roads and canals, and create a centralized and efficient government that served as a model for the rest of dynasties that preceded it.