The wartime policy of the United States was initially to help China become a strong ally and a stabilizing force in postwar East Asia. As the conflict between the Kuomintang and the Communists intensified, however, the United States sought unsuccessfully to reconcile the rival forces for a more effective anti-Japanese war effort. Toward the end of the war, United States Marines were used to hold Beiping (Beijing) and Tianjin against a possible Soviet incursion, and logistic support was given to Kuomintang forces in north and northeast China.