On January to April 1945, the joint and combined military force of Filipino soldiers and officers under the Philippine Commonwealth Army and Philippine Constabulary units and the American soldiers and officers under the United States Army units was recaptured and they liberated the town municipality of San Leonardo, Nueva Ecija and they helped the Novo Ecijano and Hukbalahap Communist resistance groups and defeat the Japanese soldiers and officers under the Imperial Japanese Armed Forces and the Makapili soldiers and begins the Battle of San Leonardo and the Battle of Gapan between the Japanese and the combined American and Philippine Commonwealth troops on January to April 1945 and ended World War II.