Official PRC name for its involvement in the Korean War. Over 2 million troops of the
中国人民志愿军 (Chinese People's Volunteer Army) crossed the Yalu from October 1950 under Peng Dehuai (
彭德怀). Mao's eldest son Mao Anying (
毛岸英) was killed in an American airstrike in November 1950.