What did the US do to help win the war?

The United States played a crucial role in winning World War II by providing significant military support and resources to the Allied forces. This included the production of war materials through programs like the Lend-Lease Act, which supplied weapons and supplies to countries like Britain and the Soviet Union. Additionally, American forces engaged in key battles in Europe and the Pacific, ultimately leading to the defeat of Axis powers. The U.S. also contributed to the development of new military strategies and technologies, including the Manhattan Project, which produced the atomic bombs that were dropped on Japan, hastening the end of the war.