Who did the United States fight in World War II?

The United States fought against Japan, Germany, and Italy during World War II as part of the Allied Powers' efforts to combat the Axis Powers. Each of these nations was a significant adversary: Japan attacked the United States at Pearl Harbor, leading to America’s direct involvement in the war; Germany, under Adolf Hitler, posed a major threat in Europe and initiated the conflict with its aggressive expansion across the continent; and Italy, led by Benito Mussolini, was allied with Germany and engaged in military campaigns in North Africa and elsewhere.

The alignment of these nations as the primary opponents of the United States is well-documented and pivotal to understanding the military and political dynamics of the war. The collaboration between these three Axis nations created a formidable challenge for the Allied forces, which also included nations like the United Kingdom and the Soviet Union, ultimately leading to a multifaceted global conflict.