Still got a lot going on, so this post will be rather brief. It's a couple interesting 20th Century alternate-history scenarios courtesy of my message-board.
The first is A Blunted Sickle, in which the French implement a different war plan and keep a mobile reserve during the lead-up to the German attack. When the breakout in the Ardennes occurs, the French are able to come down on it rather than having their soldiers cut off in Belgium as in our history. The Battle of France just got really interesting. I'd give away some particularly interesting highlights, but the only ones I can think of are spoilers. Sufficient to say, I really recommend this one.
And here's Decimation: A Europe After The French Break at Verdun. World War I is ended a lot earlier than in our history, but Continental Europe descends into revolutionary chaos soon afterward. Notable for a Trotskyist secessionist regime in France, Lenin active in Bohemia, and a whole lot of Balkan bloodletting. Really interesting in terms of concept--it's told like one of Robert Kaplan's travel-books, interspersing description of the present day of an alternate timeline with accounts of the history behind it.