Originally Posted by Halardfan
The Soviets seem to have required little reason for mass murder in World War 2, for example the Katyn Massacre of thousands of Poles.
Well, there was a reason for it--to make sure that these officers (who were not likely to collaborate with the Soviet's Polish liberation army) were eliminated.
It wasn't, perhaps, a good reason. But it was a reason.
A lot of people forget that just as the Western Allies had foreign contingents (Czechs, Poles, Free French, etc.) fighting for them, so did the Soviets.