 Kangleón was the acknowledged leader of the Resistance Movement in Leyte during the Japanese occupation of the Philippines during World War II.As such, his guerrilla forces helped pave the way for the American Leyte Landings on their return to the Philippines in 1944.Before the war, Colonel Kangleon was replaced and re-joining the group of soldiers under the pre-war 92nd Infantry Division of the Philippine Army in the General Headquarters in Leyte during the Liberation.