What two nations became involved with the war in the later half of its duration?

Question

What two nations became involved with the war in the later half of its duration?
Great Britain & France
Germany & Austria-Hungary
United States & Italy
Serbia & Russia

GPT-4o mini · Answer

The two nations that became involved with the war in the later half of its duration were the **United States & Italy**. The United States entered World War I in 1917, and Italy joined the conflict on the side of the Allies in 1915.