Fort Hughes was occupied by Japanese forces after their conquest of the Philippines. The fort was surrendered along with Corregidor and all other US and Filipino forces in the islands on 6 May 1942. The fort's garrison executed destruction procedures on their guns prior to their surrender and the Japanese occupation. The Japanese were able to salvage the 3-inch guns of Battery Fuger and redeploy them at the Malinta Tunnel on Corregidor. Also, Battery Idaho's four AA guns were redeployed to Clark Field.