IIRC, the Soviet Union didn't test their first bomb until 1949, well after the war ended. Are you suggesting that the Soviets stopped their advance because of the American bomb?
Edit: Oh, I just noticed the bit in your comment about the 1950s/60s. So your contention is that the war might have reignited had there been no atomic bomb?
Edit: Oh, I just noticed the bit in your comment about the 1950s/60s. So your contention is that the war might have reignited had there been no atomic bomb?