What was the United States' most important contribution to the Allied war effort?
Pearl Harbor is in Hawaii, which is part of the United States. At the time Pearl Harbor was bombed, the United States had not yet decided to join the war. The United States were neutral. Japan was the country that bombed Pearl Harbor. Japan was an Axis Power. Because of the bombing, the United States decided to join the war. The United States became an Allied Power.
Commanders and leaders United States Dwight Eisenhower (Supreme Allied Commander) United States Anthony McAuliffe (101st Airborne Division) United States Omar N. Bradley (12th U.S. Army Group) United States Courtney Hodges (1st U.S. Army) United States George S. Patton (3rd U.S. Army) United Kingdom Bernard Montgomery (21st Army Group)