During World War II, the occupying Japanese built Cabanatuan Prison Camp, where many American soldiers were imprisoned, some of whom had been forced to endure the infamous Bataan Death March. In January 1945, elements of the U.S. Army 6th Ranger Battalion and two teams of Alamo Scouts marched behind enemy lines to rescue the prisoners in what became known as the Raid at Cabanatuan. As a result of the raid on January 30, 1945, victorious Filipino guerrillas, American troops of the U.S. Army 6th Ranger Battalion and Alamo Scouts celebrated having obtained the freedom of 500 American POWs. Soon thereafter, Philippine and American forces re-established the presence of military general headquarters and military camp bases of the Philippine Commonwealth Army, Philippine Constabulary 2nd Constabulary Regiment, and the United States Army in Cabanatuan from February 1, 1945, to June 30, 1946, during the Allied Liberation. Before long, the combined Philippine Commonwealth and American armed forces, in cooperation with local guerrilla resistance fighters and Hukbalahap Communist guerrillas, had liberated Central Luzon from Japanese Imperial forces, a campaign that lasted from January until August 1945.