What were specific contributions that the unites states made towards winning the war?

Answer 1

For World War Two, the United States had the Yalta Agreement, an agreement in which all Allied Powers disscused on how divide Germany and Berlin. There was also the policy of "Total War", where the US made a large number of factories build weapons, and a large number of farms gave a portion of their crops to the army. There was also Invasion of Normandy, where the US invaded the once Nazi occupied France. There was also the strategy of Island Hopping, where Gen. Douglas MacArthur captured the weakest Axis held island in the Pacific, then moved onto the next island. There were the drafts that were ordered, and the bombing of Hiroshima and Nagasaki with the Fat Man and Little Man atomic bombs. And there was the Napalming of Tokyo, which was a pycological victory. The US also cut supplies to Japan and Germany, this resulted in the supprise attack of Pearl Harbor.