Within hours of the Japanese attack on Pearl Harbor, bombs were raining down on U.S. and Filipino forces in the Philippines. With U.S. planes in the Philippines destroyed and the U.S. fleet significantly lost/damaged after Pearl Harbor; the necessary supplies and reserves were not on the way. After months of vicious fighting against overwhelming Japanese forces, the Allied forces surrendered. They were then faced with a brutal march to P.O.W. Camps located throughout the islands. Thousands perished on the march before ever reaching the P.O.W. camps, where countless more died. The surrender of the Philippines, often forgotten in U.S. history, was the largest surrender by U.S. military forces. Despite their much higher loss of life during the same events, the Bataan Death March is commemorated in the Philippines every year.