[1] The following year, he went to Mahón, under the orders of his elder brother, the Marquis of La Romana, and in 1807 went with him as part of the Division of the North, and returning to Spain at the outbreak of the Peninsular War.
General Henry O'Donnell, who had installed himself at Tarragona and had strengthened its garrison with 6,000 men, sent Caro to attack Villafranca and Manresa.
[1] In August 1810 he was one of the senior officers that forced his older brother, José Caro Sureda, the despotic[2] captain general of Valencia, to resign his command and flee to Mallorca.
[1] In May, he was relieved of his command[1] by Juan de Contreras, and the place was besieged and finally fell, at the end of June.
[1] On his return to Spain, he was appointed military governor of the Citadel of Barcelona in June 1814, and in May 1815 he was promoted to lieutenant general.