The Marine station underwent massive reconstruction and was again ready for naval endeavors on September 26, 1945. Shortly after the marines resumed their duties, the Tydings-McDuffie Law set provision for Philippine independence and was granted on July 4, 1946. Nonetheless, the US maintained that it would still retain the country's military bases. The Philippines, acknowledging its frailty in the Cold War, entered into the RP-US Military Bases Agreement on March 14, 1947. The US was granted the right to retain sixteen military bases and to administrate the town of Olongapo. Several significant urbanization projects were orchestrated, but the most challenging was as gigantic as displacing half the part of a 1,200-foot mountain, that needed around 20 million man-hours, and required five years of labor. The exceptional air station and pier construction of the Seabees was the highlight of 1956 in Subic Bay. Another accomplishment at the height of the cold war was ammunition bunkers and buildings that occupied over 12,400 acres of the Southwestern part of Subic Bay. Set in the tropical rainforest, ammunition and ordnance from these facilities played a big role in the Vietnam War and in the Gulf War of 1991.