sentences:  He soon went to exile in Japan for safety but returned to found a revolutionary government in the South as a challenge to the warlords who controlled much of the nation.In 1923, he invited representatives of the Communist International to Canton to re-organize his party and formed a brittle alliance with the Chinese Communist Party.He did not live to see his party unify the country under his successor, Chiang Kai-shek in the Northern Expedition.