Two words...Yalta Conference. I fail to believe that FDR, let alone Churchill, were dumb enough to fall into that trap. Seems like they willingly went along and sold our Slavic ancestors down the river...the Volga, that is!
The Yalta Conference was in Feb, 1945.
FDR died in April, only two months later.
Churchill wrote that he could tell FDR was on his last leg and fading.
The Russians knew this and did everything possible to keep the two western allies apart, including setting up the housing so FDR was next door to Stalin while Churchill was practically down the street.
The Russians also kissed Rosies butt while ignoring Churchill.
They even had Stalin and FDR sitting in chairs only inches apart while Churchill’s chair was at least a foot away. Look at the official photos from the conference and you will see Stalin and FDR smiling and a po’d Churchill.
It worked on FDR and Churchill felt it better to go with FDR than to split with him and by default throw FDR into the Soviet camp.
Churchill was no saint when it came to divvying up eastern Europe but the Russians played FDR like a fiddle.