Who were the main adversaries of the United States during World War II?

The main adversaries of the United States during World War II were Japan, Germany, and Italy. This group of countries is known collectively as the Axis Powers, which opposed the Allies, including the United States, the United Kingdom, the Soviet Union, and others.

Japan's involvement started with its aggressive military expansions in Asia and the Pacific, leading to the attack on Pearl Harbor in December 1941, which prompted the U.S. to formally enter the war. Germany, under Adolf Hitler, was a major Axis Power, launching widespread military campaigns across Europe and instigating conflict on multiple fronts, including the invasion of Poland in 1939. Italy, initially led by Benito Mussolini, partnered with Germany in military campaigns and sought to expand its territory in Africa and Europe.

The other choices include countries that were not part of the Axis Powers during World War II. France was actually one of the Allies, and while Japan is correctly included, China was an Allied nation fighting against Japan. Similarly, while Spain and Portugal were neutral during the war, they did not engage alongside the Axis. The Soviet Union was an adversary of Germany but also initially had a non-aggression pact with them until they were invaded in 1941. Thus,