Death of Lin Biao

Date: September 13, 1971 • Location: Undurkhaan, Mongolia

Following a failed coup attempt, Mao Zedong's second-in-command Lin Biao died in a plane crash while attempting to flee China.

Project 571 was the code name given to an alleged plot to execute a coup d'état against Chairman Mao Zedong in 1971 by the supporters of Lin Biao, then Vice Chairman of the Chinese Communist Party. In Chinese, the numbers "5-7-1" sound very similar to the term 'armed uprising'.