Whakakiia te rerenga e whai ake nei: I te tīmatanga i mahi ia i roto i te ope French me te whawhai i roto i te Pakanga Tuarua o te Ao, te Pakanga Tuatahi o Indochina,
Ko te raru o Suez me te Pakanga o Algeria, i mate ai ia i te mahi. I tua atu i te wa poto i noho ai ia i roto i te whakaeke French me te kaipupuri i te Pakanga Tuarua o te Ao, i mahi ia ki te Legion Foreign mai i te 1936. I whakahau a Jeanpierre i te 1st Foreign Parachute Battalion, i whakawhānuihia ki te 1st Foreign Parachute Regiment (1er REP) tae noa ki tona matenga i te Pakanga o Algeria.