Have a look at Vietnam, Cambodia, and Laos when the French had them.
If ever there was a message for the Americans who went into Vietnam, it was the way the Vietnamese kicked the French militaries ass at Dien Bien Phu. I believe the same happened in Algeria all be it on a much larger scale and closer to home.
No winning hearts and minds with the French, just stick the Foreign Legion in as part of the occupying force with their thugs, rapists and gangsters with no fixed abode other than France.
How to piss off the colonialists in one easy movement.
I bet the French surrender at Dien Bien Phu was great fun too.