Chiang Kai-shek threatened the French with war in response to manoeuvering by the French and Hồ Chí Minh against each other, forcing them to come to a peace agreement. In February 1946, he also forced the French to surrender and renounce all of their concessions and ports in China, such as Shanghai, in exchange for withdrawing from northern Indochina and allowing French troops to reoccupy the region starting in March 1946.