I'm no expert on this, as you are, and no doubt occupation of any sort is horrible, as it certainly must have been in Russia in the various occupations following the revolution, mostly (but not only) German.

But it seems to me that, when the civil war was raging, all the while the Germans had the Russians by the balls (and Lenin recognised this, see Luxemburg on the subject), a few of those Polish battalions who'd been fighting alongside the Tsar's Russian troops prior to the revolution, went over to the other side of the civil war.

Maybe this is just a legend, but I don't think it is. In any event, the people (well, person really) who ran the Soviet Union after things settled out of that civil war had a long memory in addition to being a homicidal paranoid maniac.

Long story short, unless the popular will of the people say otherwise, talking spit about history and assigning blame is the province of the various elite who have too much time on their hands, like me today...

 

The Hun is always either at your throat or at your feet. Winston Churchill