Brad is absolutely right, this is no new news.
Nevertheless, what bewilders me is an undeniable fact: except for good historians and wwii history enthusiasts, most people today are completely unaware of this news... Most reasonably informed people in the western hemisphere believe war started as an isolated aggression of Germany against Poland on September first, 1939, in complete ignorance or oblivion of the fact that 16 days later, Russia invaded Poland from the east, happily meeting and parading with the Germans in Brest-Litovsk as previously agreed on the Ribbentrop-Molotov pact. They started WWII together, cheerfully dividing Poland among themselves, enjoying the spoils of their mutual conquest, remaining in peace for almost 2 years!
It’s amazing how Soviet era (and current Russian) propaganda were successful in wiping out from ordinary people’s knowledge their perfidious and front stage roll in starting the war! Just my bewilderment...