World War II contributions

World War II was a global conflict from 1939 to 1945 involving many nations, primarily the Allies and Axis powers. The Allies, led by the U.S., Soviet Union, UK, and others, contributed through military combat, industrial production, and technological innovation such as radar, aircraft carriers, and the atomic bomb. Their efforts were crucial in defeating Axis forces led by Germany, Japan, and Italy. Additionally, wartime research advanced medicine, communications, and manufacturing. The collective contributions by soldiers, scientists, and workers helped end the war and shaped post-war geopolitics, technology, and international institutions.