He entered the navy at the age of seventeen, cut out a Carlist vessel in 1839, and became a midshipman at twenty-two, obtaining the cross of naval merit for saving the life of a sailor in 1841 and became a lieutenant in 1845.

[1] Having been appointed chief of the Carrara arsenal at Cádiz, he was elected a deputy and joined the Union Liberal of O'Donnell and Serrano.

He was sent out to the Pacific in command of the frigate "Blanca," and was present at the bombardment of Valparaíso and Callao, where he was badly wounded, and in other engagements of the war between Chile and Peru.

[1] On his return to Spain, Topete was made port captain at Cádiz, which enabled him to take the lead of the conspiracy in the fleet against the Bourbon monarchy.

He sent the steamer "Buenaventura" to the Canary Islands for Serrano and the other exiles; and when Prim and Sagasta arrived from Gibraltar, the whole fleet under the influence of Topete took such an attitude that the people, garrison and authorities of Cádiz followed suit.