September 13 – The Chinese Communist military leader Lin Biao dies in a plane crash in Mongolia after what appeared to be a failed coup to oust Mao. After his death, he was officially condemned as a traitor.
^1971年9月13日 林彪叛国出逃坠机身亡. china.org.cn. 11 September 2009. Archived from the original on 16 September 2012. Retrieved 30 November 2019. "9月13日凌晨3时,林彪乘坐的256号飞机在蒙古温都尔汗附近肯特省贝尔赫矿区南10公里处强行着陆坠毁"