Kammala jumla mai zuwa: Bayan kammala karatunsa a 1774, Folch ya yi yaƙi a yakin basasa a Arewacin Afirka da Bahar Rum na tsawon shekaru da yawa, gami da Siege of Melilla (1774<unk>75),
mamayewar Algiers, da kuma kewaye Gibraltar (1780). An ba shi mukamin Laftanar a 1780 kuma a 1786 ya sami mukamin kyaftin. Folch ya isa Amurka a shekara ta 1780 tare da rundunar soja ("Ejército de Operaciones") wanda Victoriano de Navia ya umurce shi, kuma ya yi aiki ta hanyar sa har sai an daukaka shi zuwa kyaftin a ranar 22 ga Nuwamba, 1786. Watanni bakwai bayan haka, a ranar 19 ga Yuni, 1787, an nada shi kwamandan ofishin a Mobile, inda ya shirya binciken da kuma hukuntawa a kan Maroons. A watan Agustan 1793, an ba Folch wani jirgin ruwa na jirgin ruwa don yin taswirar tsakiyar yankin yammacin lardin gabashin Florida, yankin da ke kusa da Tampa Bay. Bayan ya yi wannan aiki mai wuya, gwamnan Louisiana, Baron Carondelet, ya naɗa shi ya ja-goranci ƙananan jirage biyu da ya shirya don su riƙa kula da bakin teku kusa da bakin Kogin Mississippi. Folch ya yi wannan sabis daga Yuli, 1794, zuwa Yuli, 1795. A ranar 28 ga Yuli, 1795, Carondelet ya nada Folch a matsayin sabon kwamandan sansanin San Fernando de las Barrancas. Wannan wuri ne mai wahala a Chickasaw Bluffs da ke kallon Mississippi, wurin Memphis na zamani, Tennessee. Folch ya yi aiki a can har zuwa Satumba 1796. An ba shi aiki na gaba a Pensacola, inda ya yi aiki a matsayin kwamandan daga Satumba 30, 1795, har zuwa Maris 30, 1804. A watan Yunin 1796 an nada shi gwamnan Yammacin Florida.