Read Paul Murray's Book - Legionnaire
Its a stout account of his years in the legion, no holds barred - rough stuff. He fought all through the last three years of the French-Algerian war of independence.
He is so much more of a badass than as portrayed in this film, most of which is a mere surface gloss on what he went through.
https://www.amazon.com/Legionnaire-French-Foreign-Legion-Toughest/dp/1529054354