The officers and men of the Cooper’s Unit, Southern Mindoro Guerrilla Force, Bolo Area, 6th Military District based in San Jose, Mindoro which was made the Alpha Company of the Romblon Special Battalion that liberated the island of Romblon from the Japanese stronghold in March 1945. This unit was finally reorganized and became part of the 51st Infantry Regiment, Philippine Army, less the 3rd Battalion, Cannon and Anti-Tank Companies under the United States Army T/O & F, 8 May 1945 per Headquarters Philippine Army General Order No. 54 dated 8 May 1945.