Cartagena de Indias
In 1741 he commanded a great fleet formed by one hundred and ninety-five ships and around thirty thousand men whose objective was to take the Spanish port of Cartagena de Indias, main port of the Viceroyalty of New Granada, defended by the Spanish admiral Blas de Lezo. The British fleet totaled two thousand cannons arranged in almost one hundred and eighty ships, including three-bridge ships (eight), ships of the line (twenty-eight), frigates (twelve), bombards (two) and transport ships (one hundred and thirty), and around thirty thousand combatants including sailors (fifteen thousand), soldiers (nine thousand regulars and four thousand from the American militias) and black slaves from Jamaica (four thousand).
The defences of Cartagena included three thousand men among regular troops (about one thousand seven hundred and eighty), militiamen (five hundred), six hundred Indians brought from the interior, plus the seamen and landing troops of the six warships that the city had (one hundred and fifty men): the Galicia, which was the captain ship, the San Felipe, the San Carlos, the África, the Dragón and the Conquistador. After taking some of the city's defences, the British assault on the castle San Felipe de Barajas, the last important bastion defending it, failed on April 20; with a large part of the troops ill, heavy casualties suffered in the fighting and the arrival of the rainy season, the British opted to destroy the defences within their reach and abandon the siege.
British losses were very heavy: some four thousand five hundred dead, six ships lost and between seventeen and twenty badly damaged.4 The latter forced the British Government to concentrate its forces on the defence of the metropolis, the northern Atlantic and the Mediterranean, and to discard new campaigns in the Spanish colonies in America.4 The defeat at Cartagena derailed British plans for the campaign and allowed Spanish rule in the region to continue for several more decades.5 The British, certain that they were going to take the victory, had rushed to mint coins and medals to celebrate it.6 These medals read on their obverse: "British heroes took Cartagena April 1, 1741" and "Spanish pride humiliated by Vernon. "76
Vernon's expedition continued its operations in the Caribbean without further success after the failed attack on Santiago de Cuba, thanks to the defence plan deployed by Governor Francisco Cagigal de la Vega and the French engineer Francisco de Langle.8 Vernon returned to England with the bulk of the fleet in 1742.
At the end of May 1741, the British forces in the Caribbean decided to attack Cuba. Vernon captured Guantánamo Bay, briefly renaming it Cumberland Bay. He arrived with a force of eight warships and 4,000 soldiers with plans to march on Santiago de Cuba, but finally abandoned the half-hearted attempt in December after sickness broke out again. Vernon could no longer hold back his anger at what he perceived as Wentworth's ineptitude and a bitter quarrel ensued ending in the recall of both parties to Britain at the end of 1742.