The thing was about Atom Bombs.
They weren't that big of a deal at the time. The Hiroshima bomb has nowhere near the yield of today's devices. We were going far more damage to Japan with conventional bombing. The Japanese STILL thought they could get a negotiated peace that would leave them with some of their gains in Asia.
When the USSR entered the war, that was it. They knew that they either faced surrender to the Americans or being partitioned like Germany.
Obviously, after the war, everyone started to realize what had been let out of the bottle with nukes, but at the time, not so much. It was just another weapon.
You're still speculating. Show me where Russia's advances influenced the decision by Japan's emperor to surrender.
You mean other than the records of the Japanese High Command?
Stalin ? not the Bomb ? made Japan surrender, ending WW2
The impact of the Soviet declaration of war and invasion of Manchuria and Sakhalin Island was quite different, however. Once the Soviet Union had declared war, Stalin could no longer act as a mediator — he was now a belligerent. So the diplomatic option was wiped out by the Soviet move. The effect on the military situation was equally dramatic. Most of Japan’s best troops had been shifted to the southern part of the home islands. Japan’s military had correctly guessed that the likely first target of an American invasion would be the southernmost island of Kyushu. The once proud Kwangtung army in Manchuria, for example, was a shell of its former self because its best units had been shifted away to defend Japan itself. When the Russians invaded Manchuria, they sliced through what had once been an elite army and many Russian units only stopped when they ran out of gas. The Soviet 16th Army — 100,000 strong — launched an invasion of the southern half of Sakhalin Island. Their orders were to mop up Japanese resistance there, and then — within 10 to 14 days — be prepared to invade Hokkaido, the northernmost of Japan’s home islands. The Japanese force tasked with defending Hokkaido, the 5th Area Army, was under strength at two divisions and two brigades, and was in fortified positions on the east side of the island. The Soviet plan of attack called for an invasion of Hokkaido from the west.