 Complete the following phrase:  In October 1945, one month after the surrender of the Japanese, Wang was promoted to lead one of the seven columns of the Northwest Field Army, under the command of Peng Dehuai. Wang fought against the Kuomintang until most of Chiang Kai-sheks forces were withdrawn to Taiwan in September 1949. In October Wangs forces were directed by Peng to occupy Xinjiang. Most defenders 