How did the builders get so much terracotta for the army?

The builders of the Terracotta Army sourced the clay locally from the nearby Lintong district in China. They utilized traditional pottery techniques, employing thousands of laborers to create the life-sized figures, which involved molding, firing, and assembling the pieces. This large-scale production was facilitated by the centralized resources and manpower available during the Qin Dynasty under Emperor Qin Shi Huang. The result was an impressive and vast army intended to accompany the emperor in the afterlife.