sentences:  At the end of the Northern Expedition, Chiang Kai-shek began to agitate to reorganize the army, the fact that it would alter the existing territorial influences among the Cliques in the party quickly aggravated the relationships between the central government and the regional powers.Li Zongren, Bai Chongxi and Huang Shaohong of the Guangxi Clique were the first to break off relations with Chiang in March 1929, which started the confrontation that lead to the Central Plains War.Chiang Kai-shek defeated the Clique in 1929.