The 21st Infantry Division, Philippine Commonwealth Army, USAFFE was found military establishment and built of the general headquarters was active on July 26, 1941 to June 30, 1946 and they stationed in Pangasinan during the pre-World War II era. From the conflict engagements of the Anti-Japanese Imperial military operations included the fall of Bataan and Corregidor and aiding the USAFFE ground force from January to May 1942 and the Japanese Insurgencies and Allied Liberation in Pangasinan from 1942 to 1945 and some parts in North-Central Luzon and helps local guerrillas and American forces against the Japanese.