The Zhongshan Warship Incident (), or "March 20th Incident", on March 20, 1926, involved a suspected plot by Captain Li Zhilong of the warship Chung Shan to kidnap Chiang Kai-shek. It triggered a political struggle between the Communist Party of China and Kuomintang. Left wing led by Wang Jingwei against Chiang Kai-shek and the Kuomintang Right wing faction resulting in Chiang becoming the head of the Kuomintang party and commander-in-chief of all the armies for the Northern Expedition.