During the Second Sino-Japanese War, the Military Police troopers sometimes found themselves clashing with the Japanese despite the fact that they were neither properly trained nor equipped for such combat tasks. In the January 28 Incident, Shanghai and Battle of Nanjing in 1932 and 1937, the Military Police put up fierce resistance against the Japanese forces, and suffered heavy casualties. The Military Police were also instrumental in operations behind Japanese line, and in time continued to expand under the direction of Nationalist Military. Military Police were also active in keeping the influences of the communists at bay, and were successful at quelling an attempted insurrection by the communists in 1941. The last task of the Military Police in the war was to provide escort to the Japanese delegates to arrange the surrender.