What were the names of the big 3?

Answer 1

If you're referring to the big 3 political leaders in the years following on from the second world war and during the cold war, then they are Churchill, Stalin, Roosevelt. But then, Roosevelt died and was replaced by Truman, meanwhile Churchill was replace by Atlee. Eventually Stalin died and was replaced by Khrushchev. In any case the big 3 were Great Britain, America and Russia, regardless of the leaders.