shows Boca Chica, Cartagena – 2nd from the bottom left|right|thumb|300px , Prime Minister of Great Britain, from the studio of Jean-Baptiste van Loo, 1740 The battle pitted a British invasion force of 124 ships including: 29 ships of the line, 22
frigates, two
hospital ships, various
fire ships and
bomb ships armed with a total of some 2,000 cannon, 80
troop transports and 50
merchant ships. There were at least 27,400 military personnel, of which the land force totaled 12,000 including: two British regular infantry regiments, the
15th Foot and
24th Foot, 6,000 newly raised marines and some 3,600 American colonial troops, commanded by
Colonel William Gooch (the
Lieutenant Governor of Virginia), in four battalions designated as
Gooch's American Regiment, arriving from the North American colonies on another 40 transports. The Spanish force defending Cartagena was composed of 2,700 to 3,000 Spanish regulars from the regiments Aragon, España and that of Toledo, Lisboa and Navarra just arrived in October 1740, brought by Vice-admiral Torres; a colonial regiment from Cartagena; an unspecified number of sailors; five companies of militia and 600 Indian archers, perhaps 4,000 to 6,000 defenders, manning six ships of the line and strategic fortifications—under the command of the Governor General of Cartagena,
Don Blas de Lezo and the Viceroy of New Granada,
Sebastián de Eslava.
Preliminary manoeuvres The expedition was very slow leaving Britain. Initially, contrary winds delayed the sailing until most of the shipboard provisions were consumed and a steep increase of sickness occurred among the ships' crews. Then, news of the sailing of the French squadrons and a Spanish squadron caused further delay while the British fleet was reinforced in response. The expedition suffered from manpower shortages in the navy, which required drafting two full infantry regiments, the 34th and 36th; to fill crew requirements Cathcart was ordered by the government to transfer 600 of his marines to provide marines for the
men of war. These delays cost the British three months of valuable campaign time. The 3,600 Americans were transported to Jamaica from New York on 40 transports escorted by some British men of war and arrived much sooner on 3 December 1740. The Americans were originally under the command of
General Spotswood, Governor of Virginia, who was to be second-in command under Cathcart – but Spotswood died and was replaced by Gooch as commander of the Americans. They found on their arrival that no arrangements had been made by the British government for their provisions. The lack of provisions and the climate immediately began to take a toll on the Americans, while the fleet from Britain was suffering from
typhus,
scurvy and
dysentery; by January 1741 the land forces had already suffered 500 dead, including Lord Cathcart the commander in chief, and 1,500 sick. With both Cathcart and Spotswood dead, command of the land forces went to
Thomas Wentworth, who had no previous combat command experience. In Jamaica, 300 enslaved Africans were added to the expedition as a work battalion. Additional delays before and after embarking from Jamaica cost more precious time, including a brief skirmish with a French squadron. Both the British and the Spanish were well aware that with the onset of the two-month rainy season in May, the so-called "sickly season", which would last from May to November, would also begin. The Spanish had received reinforcements but were already suffering severely from diseases as well. Similar to the British, but not as disruptive to operations, there was dissension between Lezo and Eslava. In particular, Lezo favoured a very strong, all-out defense of Boca Chica channel; Eslava's opposition led to an under-manning of some of the forward defenses, allowing the British an easier initial landing.
Attack on Fort San Luis at Boca Chica , Viceroy of
New Granada from an 18th-century painting The British expedition arrived off Cartagena on 13 March with no overall commander but with decisions being made by councils of war, with General Wentworth commanding the land forces and Vernon the sea forces. The navy had lost so many sailors by this time as a result of the epidemics that one third of the land forces were needed to fill out the crews. Although the city of Cartagena was fronted on one side by the ocean, the shore and surf were so rough as to preclude any attempt to approach it from sea. The other access channel, Boca Grande, was too shallow to allow the passage of ocean-going ships. The channel of Boca Chica was the only deep-draft passage into the harbour of Cartagena. It ran between two narrow peninsulas and was defended on one side by the fort of
San Luis, Boca Chica Castle, with four bastions having some 49 cannon, three mortars and a garrison of 300 soldiers under the command of the chief engineer, Carlos Desnaux. A boom stretched from the island of La Bomba to the southern peninsula on which was Fort San Jose with 13 cannon and 150 soldiers. Also supporting the entrance were the six Spanish line ships. Before settling to disembark, Vernon silenced the batteries of the fortresses of Chamba, San Felipe and Santiago defended by Lorenzo Alderete from
Malaga. After attacking the fort of Punta Abanicos in the
Barú Peninsula, defended by
Jose Polanco Campuzano from
Santo Domingo and a week of bombardment, the British planned to land near the smaller access channel, Boca Chica, with 300 grenadiers. The Spanish defenders of two small, nearby forts, San Iago and San Philip, were driven off by a division of three ships of the fleet under
Chaloner Ogle which suffered some 120 casualties with the alone losing 100 killed and wounded as well as taking serious damage from cannon fire from
Fort San Luis. The grenadiers landed that evening and were followed on 22 March by the whole of the British land forces: the two regular regiments and the six regiments of marines. Of the American land forces, only 300 were allowed ashore as most of the American troops of the four battalions had been dispersed to serve aboard the ships of the line to replace Vernon's losses in sailors and were not available for amphibious operations. They were followed in a few days by the artillery. After the army made camp, the Americans and the Jamaicans constructed a battery in two weeks and its twenty
24 pounder guns began battering the fort. A squadron of five ships, consisting of the ,
Prince Frederick, , , and , led inshore by
Commodore Richard Lestock, also attempted to batter the fort into submission for two days but had the worst of it, making no impression on the fort and having many men killed and three ships heavily damaged and disabled. The British artillery on land, after three days of firing night and day, made a breach in the main fort while part of the fleet assisted. Another part of the fleet engaged the Spanish ships, two of which Lezo scuttled and another, the
Galicia, he set on fire. The two scuttled Spanish ships partially blocked the channel and the
Galicia was captured by the British before it could sink. The British attacked Fort San Luis by land and sea on 5 April. The infantry advanced on the breach; however, the Spanish had already retreated to fortifications in the inner harbour. Over the following week, the landing force re-embarked and entered the harbour. The operation against Boca Chica cost the British army 120 killed and wounded, additionally 250 died from the diseases of
yellow fever and
malaria, and 600 sick were hospitalized.
Attack on Fort San Lazaro (
Madrid) built to commemorate Spanish
Admiral Blas de Lezo The next council of war decided to attempt to isolate Cartagena from the land side by an assault of
Fort San Lazaro, called in some accounts San Felipe de Barajas. With the capture of
San Luis and other outlying defensive works, the fleet passed through the Boca Chica channel into the lagoon that made up the harbor of Cartagena. The Spanish withdrew to concentrate their forces at Fort San Lazaro and the city. Vernon goaded Wentworth into an ill-considered, badly planned assault on the fort, an outlying strong-point of Cartagena, which Vernon refused to support with the fleet making specious excuses about the depth of the harbor. The ships cleared the beach with cannon fire and Wentworth landed on 16 April at Texar de Gracias. After the British gained the inner harbour and captured some outlying forts, de Lezo strengthened the last main bastion of Fort San Lazaro by digging a trench around it and clearing a field of fire on the approach. He had to hold the fort as it commanded the city and, in British hands, a bombardment would force Cartagena to surrender in a short time. Lezo defended the trench with some 650 soldiers and garrisoned the fort with another 300, while keeping a reserve of 200 marines and sailors. The British advanced from the beach and had to pass a narrow defile. There they met a Spanish force that briefly contested that passage before giving way. The only British engineer with the expedition had been killed at Fort San Luis; no one could construct a battery to breach the walls. The British decided to storm the fort outright in a
coup de main, walls unbreached, during a night attack. The night attack would allow the assault of the northern side of the fort facing Cartagena because, in the dark, the guns of Cartagena would not be able to give supporting fire. The southern side had the lowest and most vulnerable walls and the grenadiers would attempt to quickly storm and carry the parapets. But the attack started late and the initial advance on Lazaro was made near dawn, at 4:00 am 20 April, by a
forlorn hope of 50 picked men followed by 450 grenadiers commanded by Colonel Wynyard. The main body was 1,000 men of the 15th and 24th regiments commanded by Colonel Grant, then a mixed company from the 34th and 36th regiments and some unarmed Americans carrying scaling-ladders for the fort's high walls and wool packs to fill in the trench. Finally, there was a reserve of 500 marines under Colonel Wolfe. The column was led by two Spanish deserters as guides who misled the British on the southern low walled side. Wynyard was led to a steep approach and, as the grenadiers scrambled up the slope, they were received with a deadly volley of musket fire at thirty yards/metres from the Spanish in the entrenchments. The grenadiers deployed into line and advanced, slowly trading fire. On the north face, Grant fell early and the leaderless troops exchanged fire with the Spanish. Most of the Americans dropped the ladders they carried and took cover. Those ladders brought forward were too short by . After an hour, the sun rose, and as the guns of Cartagena opened fire on the British, casualties mounted. At 8:00 am, when a column of Spanish infantry coming from the gates of Cartagena threatened to cut the British off from their ships, Wentworth ordered a retreat. The assault failed, with a loss of 600 casualties from a force of approximately 2,000. Sickness and disease increased the casualties of the expedition. During the period surrounding the attack on Fort San Lazaro, Wentworth's land forces were reduced from 6,500 effectives to 3,200.
British withdrawal Don Blas de Lezo's plan had been that, given the overwhelming force against him, he would attempt 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 delay campaigning for another two months. Further, the longer the enemy had to remain mostly crowded on ships at sea and in the open on land, the more likely that insufficient supply, discomfort and especially disease would become his allies and the deadly enemies of the British. De Lezo was aided by the contempt that Vernon and Wentworth had for each other, which prevented their cooperation after the initial landing. The expedition and battle lasted for 67 days and ended with the British fleet withdrawing in defeat, with 18,000 dead or incapacitated, mostly by disease. In addition a total of 50 British ships were lost, badly damaged, disabled or abandoned for lack of crews. There were nineteen ships of the line damaged, four frigates and twenty-seven transports lost. Of the 3,600
American colonists, who had volunteered, lured by promises of land and mountains of gold, most died of
yellow fever,
dysentery, and outright
starvation. Only 300 returned home, including
Lawrence Washington, who renamed his
Virginia plantation,
Mount Vernon after Admiral Vernon. During the early stage of the battle, when the Spanish forces had retreated from different defense points to regroup in the larger fortress of San Lazaro, feeling victory in his hands Vernon dispatched a messenger, Captain Laws, to Britain to inform King George of the British forces' entry to the inner bay on 17 May. The souvenir industry, in expectation of a triumph that never came, had been busily manufacturing commemorative medals for the occasion. They were mainly made by button-makers, who copied a few basic designs and are generally of very poor quality. The largest collections of these medals can be found in the United Kingdom and the United States. Commemorative china was also produced but its survival has been rarer. In one of the medals Admiral Vernon was shown looking down upon the "defeated" Spanish admiral Don Blas de Lezo who appeared kneeling down. A contemporary song was composed by a sailor from the 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". The main reasons for the British defeat were the failure of the British to find united leadership after the commander in chief,
General Charles Cathcart, died of dysentery en route; the logistic inability to land siege artillery and ammunition near to Cartagena; the impediments made by Vernon that prevented involvement of his line ships to support the infantry forces; and the effective Spanish maneuvers carried out by the viceroy
Sebastián de Eslava, Admiral Blas de Lezo and Colonel Carlos Suivillars. There is no evidence for the claim made in recent years by works published in Spain that Admiral Vernon sent a letter to Blas de Lezo saying that "We have decided to retreat, but we will return to Cartagena after we take reinforcements in Jamaica", to which Blas de Lezo supposedly responded: "In order to come to Cartagena, the English King must build a better and larger fleet, because yours now is only suitable to transport coal from Ireland to London". Coal was not transported from Ireland to England, the reverse being the case. File:Edward Vernon by Thomas Gainsborough.jpg|British admiral,
Edward "Old Grog" Vernon File:"Toma" de Cartagena por Vernon.jpg|English medal commemorating the British destruction of the forts at Cartagena. Vernon is depicted pointing at the city. The medal says "Admiral Vernon veiwing the town of Carthagana" [sic]. The obverse has the inscription "The forts of Carthagena by Adm Vernon". Naval Museum of Madrid. File:Medalla Lezo y Vernon.jpg|Commemorative British medal of the supposed "victory". It shows Vernon looking down upon the Spanish admiral
Blas de Lezo (Don 'Blass'). The medal says "The pride of Spain humbled by ad. Vernon". Naval Museum of Madrid. ==Aftermath==