アメリカ極東陸軍
After the United States was attacked at Pearl Harbor on December 7, 1941 by Japanese forces, it entered World War II to join the Allied forces in their fight against the Axis powers. American forces led by General Douglas MacArthur, already stationed in the Philippines as a deterrent against a Japanese invasion of the islands, were attacked by the Japanese hours after Pearl Harbor. On March 12, 1942, General MacArthur and a few select officers, on the orders of President Franklin D. Roosevelt, left the American forces, promising to return with reinforcements. The 72,000 soldiers of the United States Army Forces in the Far East (USAFFE), fighting with outdated weapons, lacking supplies, and stricken with disease and malnourishment, eventually surrendered to the Japanese on April 9, 1942.