As well as being the elder brother of Ventura Caro, future Captain general of the Army, Spain's highest military rank, the Marquis was the father of three brothers who would become leading Spanish military commanders of the Peninsular War: Pedro Caro y Sureda, 3rd Marquis of La Romana (1761–1811),[1] José Caro Sureda (1764–1813)[1] and Juan Caro Sureda (1775–1820).
[2] Caro Fontes enlisted in the Real Armada in 1733 and the following year he purchased his commission as a lieutenant colonel of the Oran Dragoon Regiment, unit with which he saw action at the conquests of Naples and Sicily.
[3] In 1755 he was appointed coronel of the Batavia Dragoon Regiment garrisoned at Palma de Mallorca and promoted to Cavalry brigadier in 1761.
[3] When O'Reilly prepared his expedition to Algeria in 1775, the Marquis was given command of a brigade comprising the Guadalajara and King's Regiments.
On disembarking on the beach on 8 July, he was killed by two shots to the chest.