The correct answer to this open question is the following.
I consider that the Second World War really ended, and differences between allies grew to enter into another facet of an international conflict we know as the Cold War.
We can find some similitudes in the primary conflicts of the two wars, however, the political and economic interests of the United States and the Soviet Union clashed during this period of the Cold War.
After World War II, Soviet Union leader Joseph Stalin was not satisfied with the agreements that resulted from the Yalta Conference. This initiated a series of conflicts and differences with the United States. Both powerful countries aspired to influence and control the world.
The Korean War, Cuban Missile Crisis, the Vietnam War, and the Watergate scandal were all key events that took place during the Cold War era.