In August and Septembre of 1945, the US was rapidly pulling troops out of Europe and sending them home or to the Pacific.
If whe have to invade japan this will continue.
As such the US will have a much smaller force level in Europe 1946.
Whe will also be involved in Japan, and Russian moves in East Europe or Greece to destabilize the post war governments will be ignored.
There probably will be no or a reduced Marchall Plan.
Maybe no NATO.
OTL they was a lot of fear of Italy going Commie. ?In this case could that happen?. ?Any other changes?