An impressive coastal fortification has lain in Manila Bay between the islands of Corregidor and Carabao in the Philippines since the early 20th century. Erected in a small ship-shaped island as part of the little-known conflict between the United States and Spain, it became known as the most significant coastal fort ever built, with concrete walls up to 36 feet thick and impressive armament. During the invasion of the Philippines shortly after the attack on Pearl Harbor, the fort would hold the Japanese advance much longer than expected.For months on end, Fort Drum fiercely defended the Manila Bay surroundings and the allied interests. However, the archipelago was irremediably lost, in part due to outdated construction contrivances that were never upgraded and required extenuating human work. Three years later, as the war was coming to its end, the Americans decided to recapture the fort, but just as the Japanese had learned when facing the structure before, they soon found out just how impenetrable the fortification of their own making was.Still, the invulnerable fortress would prove no match for the brave engineers and soldiers from the 151st Infantry Regiment and a genius plan devised by one very clever officer, giving way to what would be forever known as Drum D-Day…