I'd argue that the Soviet withdrawls from Eastern Europe went pretty well. Safe, orderly, no real bloodshed.
But that's kind of the same point that I didn't articulate. A colony is not part of the country that is ruling it. The Baltic states were part of the Russian Empire, independent between the wars, and then reincorporated into the USSR. They weren't "militarily occupied", they were part fully incorporated. When someone says "militarily occupied Eastern Europe", I'd only assume they meant the countries that were "behind the iron curtain" but de jure independent, like Poland or Romania.
1: https://en.wikipedia.org/wiki/United_Kingdom#:~:text=The%20U...