[Verginius Rufus]

At Yalta Stalin promised to enter the war against Japan within two to three months after the defeat of Germany. At that time FDR couldn’t know for sure that the atomic bomb would work. Stalin kept his promise to the day, declaring war on Japan exactly three months after V-E Day.

[jamaksin]

Another perspective ... what does the Atlantic Charter say about "self-aggrandisement" and territorial intergrity after the war ends?

And, why does the US ship to the USSR, in the Spring of 1943, tens of tons of nuclear materials - including enriched uranium?