This is an interesting idea, and could prove to make the French AI a bit tougher, as the French were basically on the defensive in the latter part of the FIW. In the first few years, say from 1755-1757, the French strategy was an "offensive-defensive" one, so capturing British forts wasn't part of it, but taking unfortified towns WAS.
[color="Blue"](In fact, the victory of Oswego (fort Chouagen) and Fort William Henry were the strategic goal of this period, they allowed French to keep control of the 2 road of invasion to Canada, along with holding Fort Duquesne and Louisbourg. So yes it was, but the two time, it was montcalm and his regular who took the forts (with great help of canadians irregulars and indians) in european style siege. After, the compagnie franche, the militias and a smal number of regular defended them)
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As far as not fighting like line infantry, this was what led to the great French victory over Braddock in 1755.
[color="Blue"](False again, the Monongaela victory was one of the only offensive use of the ability of the compagnie franche de la marine to fight like regular.
I encourage you to watch this:
http://www.youtube.com/watch?v=T33NCbQzOIg. The compagnies Franche were blocking Braddock advance by acting as line infantry while the irregular, militias and indians were sharpshooting.[/color]
Marechal Cambronne, what percentage of the French forces could be called "regulars", then? I haven't studied the makeup of the French forces in North America, but some regulars were brought over from France, weren't they?
[color="Blue"]( the french had 11 regular bataillons, from 10 regiments fighting in Europe.
Militias were the backbone of the defense: 15 000 approximativly. It is the biggest civilian mobilisation recorded in history) We also had at the start of the war 2400 men of the compagnie franche de la marine on the continent and 1100 in Louisbourg and Acadie. During the war, they received 2118 recorded men in reinforcement (but historians suspects that i could be the double, we lost nearly all New France archive when british loyalist burned down Montreal Parliament to force the canadian capital to move away from the french-canadians in the 1840's). It must be added that it was these men who forced Washington to surrender at Fort Necessity, the only american president to have surrendered to an enemy

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I must also ask if you've been playing the 1755-1763 "Colonial" version of the FIW, which is interesting as the American provincials are a separate faction. As I'm an American, I find this period of history fascinating, much more so than the Revolution 20 years later. The events in North America helped spark the true first world war, which is now called the Seven Years War.
[color="Blue"](Always playing the colonial scenario, all historians agrees that there were much more opposition between americans and english than between french and canadians. And yes, it's an interesting period. How I wish we could have won it...)[/color]