Question

Which two countries were on the side of the United States in World War I but were enemies of the United States in World War II?

Answer 1

World war II was fought by two sets of countries, on the “Allied powers” ( or simply the allies) there was Australia, France, Britain, India, The Soviet Union, China and New Zealand also the United States of America. On the Axis Powers there was Italy, Japan, and Germany.

Answer 2

Italy and Japan

Explanation:

They were on our side in World War I and were our enemies in World War II. They were "Allied Powers" in World War I and "Axis Powers" in World War II.