How did the end of World War II lead to the Cold War between the United States and the Soviet Union?

The release of two atomic bombs on Japan in August 1945 helped end World War II but ushered in the Cold War, a conflict between the United States and the Soviet Union that dragged on nearly half a century. ... Cold War calculations led to a divided Germany and U.S. involvement in wars in Korea and Vietnam

Explanation:

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united states reinforcements contributed greatly to three allied victories in france at: cantigny (first major american battle), argonne (the largest in the united states military history, involving 1.2 million american soldiers), and château-thierry (one of the first actions under general pershing).