Question

Which nation entered the war late but contributed greatly to the Allies' victory?

Answer 1

The United States of America.

Explanation:

The US helped liberate hundreds of death camps all across Europe and Africa, and was a huge impact in forcing Japan and The Fascist Republic of Italy to surrender and end the Second World War.

Answer 2

The Soviet Union

Explanation:

The USA definitely played a significant part both in the Pacific and Europe after entering the war. However the Soviet Union absorbed the vast bulk of Germany's military might in Europe after it was attacked in 1941. It was in the Soviet Union that the German military machine was broken at crucial battles such as Stalingrad and Kursk.