Born in Shaanxi, Zhang led a rebel army that swept across the Yangtze region during the Ming collapse. In 1644 he occupied Chengdu and proclaimed the
大西 (Daxi) dynasty, before being killed in battle against Qing forces in 1647. The Sichuan tradition blames him for catastrophic depopulation, though modern historians debate how much was Zhang vs Ming-Qing warfare overall.