At the beginning of the war Germany had taken over many countries including France and Poland. The invasion of Poland marked the beginning of the war on September 1st, 1939. However, in 1941 when the Japanese attack on Pearl Harbor the U.S. had enough. The attack left America with less imports and exports. If the U.S. would have joined the war sooner than the Pearl Harbor attack might not have happened.
Along with the Pearl Harbor attack America had less food, gas and clothing