Fabien,
Thanks for your comments. In regard to rules, I've looked at a whole range, from "Bohica", to "FNG", to "Vietnam - the way it was". I even tried "De Cao-Bang à Kaboul". But my go-to ruleset is still "Bolt Action". It's well supported, easy to get an opponent, and has lots of supplements covering partisans, LVTs, etc.
Tim