What a coincidence that they decided Russia was a concern right after we obliterated two of their cities.
>What a coincidence that they decided Russia was a concern right after we obliterated two of their cities.<
BINGO. More revisionist crap. I knew the US should have dropped 2 more mushroom clouds on them.
Stalin's attack certainly destroyed any hope to end the conflict on a negotiated basis. According to "The Making of the Atomic Bomb" (a recommended book) and other sources, the Japanese had asked the Soviet -- who were not at war with them -- to intercede and ask for an armistice. They wanted to keep the Emperor. Stalin, knowing that, raced to grab a large piece of Asia (China and North Korea notably).
Thus betrayed by the Soviets, Japan lost its last hope for a negociated peace. The atomic carnage was the last drop. On this you are right.
In that sense, yes, the Soviets helped end the war. But they could simply have said "no". Their surprise land grab created conditions for multiple conflicts, past and future. We are still paying for the fateful weakness of Roosevelt against Stalin.