Answer:
The United States and the USRR or the Soviet Union.
Explanation:
Post World War II there were two international military alliances. NATO which is an acronym of North Atlantic Treaty Organization with the United States standing as the leader of the alliance. On the other hand, there was the Warsaw Pact which puts the Soviet Union as its leader.
That puts a beginning to the Cold War, a period of tension between these two superpowers that was best known because of its arms race and the fight of wars not directly between the two nations.
I hope this answer helps you.
