Who did the United States fight in World War II?

The United States fought against Japan, Germany, and Italy during World War II, which is why this choice is the correct answer. Each of these countries was part of the Axis Powers, a coalition that opposed the Allies, which included the United States, the United Kingdom, the Soviet Union, and others.

Japan attacked the United States directly when it bombed Pearl Harbor in December 1941, leading to the U.S. entering the war. Germany, led by Adolf Hitler, was instrumental in the conflict in Europe, and engaged in widespread aggression across the continent. Italy, under Mussolini, aligned with Germany and participated in various campaigns against Allied forces. The collaboration of these three nations created a formidable enemy that the United States and its allies had to confront throughout the war.

The other options mention countries or conflicts that do not pertain to World War II. As a result, they do not accurately reflect the adversaries of the United States in that global conflict.