 Nyorai kupfuurira kweiyi ndima - Barré akabatana ne32nd Regiment yeVashandi vePasi semukuru muna 1746. Iyo regiment yakanga yakavakirwa muFlanders munguva yeHondo yeAustria yeHondo, uye Barré akawana ruzivo rwake rwekutanga rwechiuto pamberi pekuguma kwehondo muna 1748. Akaramba achishumira, uye akasimudzirwa kuva lieutenant muna 1755, uye kaputeni muna 1756. Munguva yeHondo yeFrance neIndia, akashanda pasi pemutsigiri wake General James Wolfe paRochefort expedition ya1757, apo akatanga kusangana naIshe Shelburne, uye gare gare muCanada kwaakagadzwa kuva mukuru mukuru, achirwa kuLouisbourg 1758 neQuebec 1759. Muna 1759, akasimudzirwa kuva mukuru, asi chinzvimbo chacho chaishandiswa bedzi mukati mebasa rake muAmerica. Mukurwisa kweQuebec, uko Wolfe akaurayiwa, Barré akakuvadzwa zvakakomba nebara muchipfuva uye akarasikirwa nokushandisa ziso rake rorudyi. Akanga ari pakati peboka rakaungana rakakomberedza Wolfe aifa, uyo akaitwa asingafi mumufananidzo wakakurumbira waBenjamin West. 