How was Hitlers strategy to dominate Europe fractured ?

It's because he was a walking breathing piece of s h i t

Explanation:

During the Cold War, the world feared the devastation that nuclear weapons could cause so the United States, Great Britain, and the Soviet Union signed the Limited Test Ban Treaty.

To add, the Cold War was a state of geopolitical tension after World War II between powers in the Eastern Bloc and powers in the Western Bloc.