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The wartime alliance between the United States and the Soviet Union began to unravel because the United States felt threatened when Joseph Stalin signed a nonaggression pact with Germany. The wartime alliance between the United States and the Soviet Union began to unravel even before the end of World War II. When the war ended, the Red Army occupied much of Eastern Europe, thus it is believed that origins also play a role in the wartime alliance.
The reason the wartime alliance between the U.S. and the Soviet Union unraveled was because they both subscribed to different styles of economic governance.
Why did the wartime relationships between the U.S. and the Soviet Union unravel?
The Americans believed in the free market as well as liberty and justice for its people while the Soviets believed in Communism where the lives of the citizens would be controlled.
This led to direct competition between the two powers as they struggled for dominance across the world.
Find out more on U.S. - Soviet Relations at https://brainly.com/question/1296011.