I te tau 1772, ka hoki mai a Gálvez ki Spain i te taha o tana matua keke, a José de Gálvez. I muri mai, i tonoa ia ki Pau, France, i reira i mahi ai ia ki te Royal Cantabria regiment, he roopu rangatira French-Spanish, mo nga tau e toru. I reira, i ako ia ki te korero i te reo Wīwī, i pai ai tana mahi i a ia i te wa i riro ai ia hei kawana o Louisiana. I whakawhitihia ia ki Seville i te tau 1775, ana ka uru atu ia ki te haerenga kino a Alejandro O'Reilly ki Algiers
He aha? I whara kino a Gálvez i te wa o te mahi i te wa i whakaekehia ai e nga ope Paniora te pa kaha e tiaki ana i te taone nui; I muri mai ka tohua ia hei kaiwhakaako i te whare wananga hoia o Ávila ka whakatairangahia hei koromatua. I whakatūria ia hei koroneela i te tau 1776.