Battle of Cartagena de Indias
The Battle of Cartagena de Indias was the decisive battle of a massive amphibious expedition by the forces of Britain under Vice-Admiral Edward Vernon against Spain under Admiral Blas de Lezo, taking place at the city of Cartagena de Indias, in present day Colombia, starting in March 1741. It is the most significant battle in the War of Jenkins' Ear and one of the largest naval campaigns in British history, though it is now largely forgotten by the British, blending into the greater conflict of the War of the Austrian Succession. It ended in a major defeat and heavy losses for the British: 50 ships lost and 18,000 casualties.[9]
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[edit] Background

Sir Robert Walpole
The War of Jenkins' Ear was a conflict between Great Britain and Spain that lasted from 1739 to 1748. Under the 1729 Treaty of Seville, the British had agreed not to trade with the Spanish colonies except under extreme conditions restricted to the Annual Ship and the Asiento slave trade.[10] The commercial class in Britain demanded access to the lucrative Spanish markets of the Caribbean Basin and Spanish colonists desired British-made goods so a burgeoning Black Market had developed. By the terms of the treaty, the Spanish were permitted to board British vessels in Spanish waters. After one such boarding in 1731, Robert Jenkins, captain of the ship Rebecca, claimed that the Spanish coast guard had severed his ear. Jenkins exhibited his pickled ear to the House of Commons. This only served to heighten the "war fever" now developing against Spain which was also driven by the desire of commercial and military domination of the Atlantic basin.To much cheering, the British Prime Minister, Robert Walpole, reluctantly declared war on 23 October 1739.[11] Vice-Admiral Vernon was an active and ardent supporter of war against Spain and spoke for offensive action both in Parliament and before the Admiralty.[12]
[edit] Spanish Caribbean
The Spanish Caribbean basin trade had a network of four main ports: Vera Cruz, Cartagena, Porto Bello (now Portobelo) and the main port through which all the trade of those three came through, Havana. On 22 November 1739 one of the first actions of the War was the British capture of Portobelo which was part of the Viceroyalty of New Granada. The attack was part of an attempt to damage Spain's finances. The poorly defended port was attacked by six ships[13] of the line under Vice-Admiral Edward Vernon.[14] The relative ease of this capture, although it was quickly recaptured by the Spanish after Vernon's fleet departed, caused jubilation in Britain and resulted in Vernon being given command of a very large naval contingent consisting of one fourth of the British Royal Navy in ships and sailors of a major land and sea amphibious expedition under the overall command of Lord Cathcart.[15] Unfortunately for British hopes Lord Cathcart died en route and it remained unclear who was then in command overall. Lord Cathcart's untimely demise would result in dissensions in the British command which would prevent the necessary coordination needed for this complex operation.
The despatch of the large fleet and troop contingent was primarily for political reasons as the government wished to gain credit for Vernon's hoped for future successes by supplying him with an overwhelming force. Vernon, himself, was not convinced that a large-scale attack on a heavily fortified city would be successful as his smaller Portobello assault had been, fearing particularly a prolonged siege would lead to heavy attrition from disease. However, he could not refuse the orders to attack a major port when he had such a large force at his command[16].
[edit] Objectives
Britain's objective was to capture and permanently retain Spain's four ports of the Caribbean basin and thereby acquire Spain's American empire. However, Britain had no place to build and refit ships in the Caribbean as Spain did with the dockyards at Havana and without a dockyard no fleet could remain in the area for any length of time without breaking down. Quick capture was imperative but England's divided ministry left the course of the campaign up to Vernon and others at a Council of War held in Jamaica. They decided on Cartagena as their initial objective as it was a good port and to windward of Britain's existing Caribbean bases.
[edit] The Battle

A Map of the trading part of the West Indies, created 1741 in honour of Vernon
showing Boca Chica, Cartagena - 2nd from the bottom left
The battle of Cartagena pitted a British invasion force of at least 26,400 in 186 ships[17] including: 29[18] Ships of the Line;[19] the rest of all types armed with 2,000 canon against a force of up to 5,000 Spanish and colonial regulars, townsmen and 600 Indian archers,[20] fighting from six frigates and massive fortifications — under the command of the Viceroy Sebastián de Eslava, Don Melchor de Navarrete, Don Carlos Des Naux, and Don Blas de Lezo.
The British expedition arrived off Cartagena on March 4 and after a couple of weeks bombardment the initial attack made by land and sea at Boca Chica, the Little Mouth, on April 5. This channel ran between two narrow peninsulas and was defended on one side by the fort of St. Louis, Boca Chica Castle, with four bastions having some 80 cannons, on the other side of the channel an earthwork battery of 15 cannon all supported by redoubts. A boom stretched from the island of La Bomba to the southern peninsula on which was Fort St. Joseph with 21 cannon. Also supporting the entrance were the 6 Spanish line ships.[21] The British army forces on land established a battery and made a breach in the main fort while part of the fleet assisted and another part of the fleet engaged the Spanish ships which, ultimately, Lezos tried to scuttle and set on fire. Two Spanish ships partially blocked the channel and one was captured by the British before it could sink. An advance was made on the breach, however the Spanish had already retired to fortifications in the inner harbor on the March 24. The landing force re-embarked and the harbor then entered. The next council of war decided to attempt to isolate Cartagena from the land side by an assault of Fort St. Lazar. The assault failed with a loss of 600 casualties.

Blas de Lezo by unknown painter
Don Blas de Lezo's plan was that, given the overwhelming force against him, he hoped to conduct a fighting withdrawal and delay the British long enough until the start of the rainy season at the end of April. The tropical downpours would effectively end campaigning for another 2 months. Also, the longer the enemy had to remain mostly at sea and in the open the more likely it would become that insufficient supply, discomfort and especially disease would become his allies and the deadly enemies of the British. De Lezo was aided in this by the contempt that Vernon and Wentworth had for each other which prevented any further cooperation after the initial landing. Wentworth was goaded by Vernon into an ill-considered, badly planned assault on Cartagena which Vernon refused to support with the fleet making specious excuses about the depth of the harbor.
An experienced, wily and tenacious Spanish Naval commander, de Lezo, whose previous career was as daring and spectacular as any naval officer of his day, made use of every advantage, strategy and tactic available to him. Cartagena's defensive fortifications had been repaired and improved over the past year. Although De Lezo was pressed to the limit, his plan bore the hoped for fruit. The rains came and the British had to board their ships, where close quarters made disease even more deadly, and by April 25, Vernon resolved to retreat to Jamaica and by mid-May they were gone.

Admiral Edward "Old Grog" Vernon
The battle lasted 67 days and ended with the British fleet withdrawing in defeat, having lost 18,000 men,[22] about half of them to disease, and 50 ships.[23] Most of the American colonists who had volunteered, lured by Vernon's promises[citation needed] of mountains of gold, died of yellow fever, dysentery, and outright starvation, and those who returned home injured, including Lawrence Washington (who renamed his Virginia plantation after Admiral Vernon) had little to show for their efforts.
In the middle of the battle, when the Spanish forces had retreated from different defense points to regroup in the larger Fortress of San Felipe de Barajas, the British dispatched a messenger, Captain Laws, to England. He informed the King of their victory on May 17. A special medal was even minted in London to commemorate this "victory" with a drawing of Admiral Vernon looking down upon the "defeated" Spanish admiral, Don Blas de Lezo who appears kneeling down.[24] A contemporary song was composed by a sailor from the Shrewsbury that prematurely celebrated the victory:
VERNON'S GLORY; OR, THE SPANIARDS DEFEAT.
Being an account of the taking of Carthagena by Vice-Admiral Vernon...
"...and the town surrender[ed]
To Admiral Vernon, the scourge of Spain".
[25]