When the World War II broke out, nonetheless Chiang Kai-shek had sought to restore Chinese influence. Being a major ally and one of the Big Four, Chiang wanted to restore Chinese influence in Korea and Southeast Asia, in a vision for a new Asia under Chiang's command. Once the World War II ended, Chiang Kai-shek started trying to implement the project, by sending troops to occupy northern Vietnam. Yet, as the Chinese Civil War resumed, it had dented Chiang's desire, and he had to retreat most of his army to fight against the now-stronger communist force. Eventually, the Republic of China lost the war and was forced to retreat to Taiwan where it continues to rule today. The expansionist policy was succeeded by the communists which later proclaimed the People's Republic of China.