The Red Army was a short distance from Warsaw when the Poles rose up against the Germans in 1944. The Red Army sat there and did nothing to help--Stalin wanted as much of the Polish anti-Communist leadership destroyed as possible. I think there was a period of several months in 1944-45 where the Soviets did not advance against the Germans on that front at all (although they were active in the Balkans during that time).
This thread is getting my blood pressure up.
Facts. The Soviets were the initial aggressors.
Stalin just wanted to finish what he started with The Katyn massacre. I watched a documentary about the Soviet resistance in Lithuania after WWII. The Lithuanians were hoping for an allied liberation, excluding Soviets, during WWII and after the war they mistakingly thought that we and the rest of the euroweenies would support them first in their bid for Independence and then in their fight against the occupying Soviet troops. Of course we did not intervene. Would not want to upset the balance of power now would we.