In 1765, Major-General Prevost married, at Lausanne, a daughter of M. Grand, of that place;[3] and, on her husband's departure to America, Mrs. Prevost accompanied him thither. George, their eldest son, was born while General Prevost was stationed in the province of New Jersey, on the 19th May, 1767. Being designed by his father for the military profession, he was placed with that view at Lochée's academy, at Chelsea, and his education was finished at Colmar, on the continent. He obtained his first commission in the 60th regiment, and being removed upon promotion to the 28th foot, he joined that corps at Gibraltar in 1784. He obtained his majority in 1790, and early in 1791, he took the command of the 3d battalion of the 60th regiment at Antigua. In March, 1794, he was promoted to a Lieutenant-Colonelcy in the 60th, and, in 1795, he proceeded to Demerara, and from thence to St. Vincent's, at that time attacked by the French. He was there actively employed in suppressing the Carib insurrection, and in resisting the French invasion, and at the storming of the Vigie he commanded a column. In October, 1795, he was ordered to Dominica, to relieve Lieutenant-Colonel Madden in the command of the troops in that island; but in January, 1796, he resumed the command of the 3d battalion of the 60th regiment at St. Vincent's, where he was twice severely wounded in successfully resisting the enemy's progress towards the capital of the colony, after the defeat of Major-General Stewart at Colonary. In consequence of his wounds, Lieutenant-Colonel Prevost obtained leave to return to England. The sense which the inhabitants of St. Vincent's entertained of his services was warmly expressed in an address from the Council and House of Representatives in that island.[4] On his arrival in England, Lieutenant-Colonel Provost was appointed Inspecting Field Officer. In January, 1798, he obtained the rank of Colonel, and proceeded in the same year to the West Indies as Brigadier-General. In 1798, he was removed from the command of the troops at Barbadoes to St. Lucie, as Commandant, where he was afterwards appointed Lieutenant-Governor, in compliance with a request from the inhabitants.[5] Brigadier-General Prevost continued to perform the duties of Governor of St. Lucie until the peace of 1802, when that colony was restored to the French. The address which he received from the inhabitants of the island on his departure, fully evinces the popularity which he had acquired;[6] while the letters addressed to him, and to Colonel Brownrigg, Secretary to H.R.H. the Commander in Chief, by Sir Thomas Trigge, at that time Commander of the Forces in the West Indies, satisfactorily prove that he merited the confidence reposed in him by Government.[7]