My paternal grand-father fought like all frenchmen in WW2. As most men, he was captured somewhere in Burgundy when the army collapsed in June 1940. He spent the remaining five years in a P.O.W camp in Germany.
I've never met him as he died in the late 1960's, but my grand mother and my father talked about me. We do have some relics about that time: a lot of pictures, some drawings and even german things he managed to steal in the camp.
His brother wasn't as lucky. He was killed in the fierce fightings in early june 1940, on the Somme front. Or "why I hate the ignorance about 1940 fightings and the whole "surrendering monkeys thing". They beat the crap out of us, but man, we fought and they bleed.
My maternal grand-father was from Algeria -which was French at the time-. He volunteered for the army in 1936 and joined the 1st Algerian Tirailleur regiment. His unit was in Algeria in 1939-1940, protecting the borders against Italy. They went back in the fray after Torch Operation and he participated, among other things, in the Provence landing and the subsequent campaigns.
Never wanted to talk much about it, though.
When my late grand-mother died, she gave me all the memories that was left, that is his military book as I am the only boy in the whole familly that have some interest in things other than TV and football. Oh, and my godfather volunteered to fight against the insurgency in Algeria back then, but that's a family thing indeed.