Avalanche Press: the only game company that gives you free game expansions and history lessons on a daily basis :-) Not all of the daily content has been archived, but there is a wealth of material available via 1. the archive 2. links on game pages and 3. google searches of avalanche press.
The one that got away: P.G. Citadel: Infantry at Kursk
Just reading the DC on Red & White, sound like a game I play just this past weekend with Twilight Struggle with my son. We had quite the fight with Eastern Europe and many of the real events occurred as stated. Although not at the same scale as PG, alternate modern history is well played out with that system.