Rubuta ci gaba don wannan sakin layi - A cikin 1772, Gálvez ya koma Spain tare da kawunsa, José de Gálvez. Daga baya, an aika shi zuwa Pau, Faransa, inda ya yi hidima na shekara uku a rukunin Royal Cantabria, wani rukunin farar hula na Faransa da Spain. A wajen, ya koyi Faransanci, wanda ya taimaka masa sa'ad da ya zama gwamnan Louisiana. An tura shi zuwa Seville a 1775, sannan ya shiga cikin bala'in Alejandro O'Reilly zuwa Algiers
Ka yi haƙuri. Gálvez da kansa ya ji rauni sosai a cikin aikinsa lokacin da sojojin Spain suka kai hari kan sansanin soja da ke tsaron birnin; daga baya aka nada shi farfesa a makarantar soja ta Ávila kuma aka daukaka shi zuwa laftanan-kolonel. An sanya shi Kanal a 1776.