The Cossacks fought the Poles in Ukraine, but never sacked Poland. The only major sacking of Poland before the Nazis was the Swedes, during the short lived Swedish Empire - which met its Waterloo in Ukraine.
The Swedes invaded Poland and Lithuania, and stole every bit of the art, cultural artifacts intellectual property and wealth of those countries, and shipped it all to Sweden. Anything they could not loot, the burned or otherwise destroyed, including
castles, churches, villages and cities. They also caused the death of nearly half the population. They did far more looting and destroying than the Nazis during WWII.
Sweden remains a criminal country, because they are bound by signed treaty to return what they looted, but to this day refuse to return anything. "Aw, gee, we just don't know where any of that stuff is." Bullshit.
I consider the purchase of a Volvo complicity in this criminality.