What a profoundly backward perspective. It's the other way around. Belarus was a part of the Russian Empire. So much a part of it, in fact, that the long form of the title of the Russian monarch contained its name. You can't "roll over" something you already own. It wasn't Russia's wars with European states that repeatedly fucked up Belarus. It was Europe's wars with Russia. Napoleon and Hitler were two notable examples - both defeated, but both rolled through Belarus first, killing and raping everything that moved.