Did the USA helps in winning WW?

Question

Did the USA helps in winning WW?
could the war had been won without the involvement of the Americans? WHY did the Americans got involved, was it because of sympathy or was it because the were politically had to?

Answer

Germany was winning the war before Japan attacked the U.S. It took a couple more years before the United States impact was felt. Germany had already overtaken France so one ally was out. From about to about Germany was the strongest nation in the war, in war terms.brThe United States involvement helped to win the war for sure. If they had not entered the war the world would be under the control of the Germans.