Thanks for links and help. I'm thinking of a French civil war modeled after Spain. There was talk at the time of such an event happening with Popular Front supporters on one side, and ranged against them rightist groups like the Croix de Feu (after summer of 1936 the Parti Social Francaise), Action Francais, and others. Big question would be where would supporters of centrists, like the Radicals, go, and which regions would be strongholds of the various sides. Paris itself might go for the right-wing, but it would have been surrounded by the red belt.