Which countries did the US fight against in World War II?

The United States fought against Japan, Germany, and Italy during World War II, which makes this the correct answer. This conflict emerged from a complex web of political tensions and aggression that characterized the years leading up to the war.

Japan was responsible for the attack on Pearl Harbor in December 1941, which directly led to the U.S. entering the war. Germany, led by Adolf Hitler, was a major Axis power in Europe and posed a significant threat to Allied nations. Italy, under Mussolini, was also aligned with Germany and engaged in military campaigns against Allied forces.

In contrast, the other choices list countries that were either not involved as enemies of the U.S. during World War II or were on the side of the Allies. For example, Russia and China were significant allies against Axis powers, while France was invaded and occupied by Germany but was also part of the Allied effort. Similarly, Vietnam and Korea were not significant players in World War II in the context of fighting against the United States. Argentina and Canada were not enemies; in fact, Canada was an ally of the U.S. in this conflict.