Field Marshal Arthur Wellesley, 1st Duke of Wellington (né Wesley; 1 May 1769 – 14 September 1852), was a British Army officer and statesman. A leading figure in early-19th-century British politics, Wellesley served as Prime Minister of the United Kingdom and as Commander-in-Chief of the Forces. Wellesley was born into the Wellesley family in Dublin, in the Kingdom of Ireland. He was commissioned as an ensign in the British Army in 1787, serving in Ireland as aide-de-camp to two successive lords lieutenant of Ireland. He was also elected as a member of Parliament in the Irish House of Commons. Rising to the rank of colonel by 1796, Wellesley served in the Flanders campaign before being sent to India, where he fought in the Fourth Anglo-Mysore War, ending the conflict with a victory at Seringapatam in 1799. He was appointed governor of Seringapatam and Mysore and, as a newly appointed major general, won a decisive victory over the Maratha Confederacy at the Battle of Assaye in 1803. Rising to prominence as a general officer during the Peninsular War, Wellesley was promoted to field marshal after leading British-led forces to victory against a French army at the Battle of Vitoria in 1813. Following Napoleon's first exile in 1814, he served as the British ambassador to France and was made Duke of Wellington. During the Hundred Days campaign in 1815, Wellington commanded another British-led army which, together with a Prussian army under Field Marshal Gebhard von Blücher, defeated Napoleon at Waterloo. After the end of his active military career, Wellington returned to politics, becoming a prominent member of the British Tory party. He served as prime minister from 1828 to 1830, as well as on an interim basis for a little less than a month in 1834. Wellington oversaw the passage of the Roman Catholic Relief Act 1829 and opposed the Reform Act 1832. He continued to be one of the leading figures in the House of Lords until his retirement in 1846 and remained Commander-in-Chief of the Forces until his death in 1852.
Early life
=== Family === Arthur Wellesley was born into an aristocratic Anglo-Irish family, belonging to the Protestant Ascendancy, beginning life as the Hon. Arthur Wesley. He was born the son of Anne, Countess of Mornington, and Garret Wesley, 1st Earl of Mornington. His father was himself the son of Richard Wesley, 1st Baron Mornington, and had a short career in politics representing the constituency of Trim in the Irish House of Commons before succeeding his father as Baron Mornington in 1758. Garret Mornington was also an accomplished composer, and in recognition of his musical and philanthropic achievements was elevated to the rank of Earl of Mornington in 1760. Wellesley's mother was the eldest daughter of Arthur Hill-Trevor, 1st Viscount Dungannon, after whom Wellesley was named. Through Elizabeth of Rhuddlan, Wellesley was a descendant of Edward I of England. Wellesley was the sixth of nine children born to the Earl and Countess of Mornington. His siblings included Richard, Viscount Wellesley, who later became 1st Marquess Wellesley and 2nd Earl of Mornington, William, who later became 1st Baron Maryborough and 3rd Earl of Mornington, and Henry, who later became 1st Baron Cowley.
=== Birth date and place === The exact date and location of Wellesley's birth are not known, but biographers mostly follow the same contemporary newspaper evidence, which states that he was born on 1 May 1769, the day before he was baptised in St. Peter's Church on Aungier Street in Dublin. However, the historian Ernest Lloyd states: "The registry of St. Peter's Church, Dublin, shows that he was christened there on 30 April 1769". Wellesley may have been born at his parents' townhouse, Mornington House at 6 Merrion Street (the address later became known as 24 Upper Merrion Street), Dublin, which now forms part of the Merrion Hotel. His mother, Anne, Countess of Mornington, recalled in 1815 that he had been born at 6 Merrion Street. His family's home at Dangan Castle, Dangan, near Summerhill in County Meath, has also been purported to have been his birthplace. In his obituary, published in The Times in 1852, it was reported that Dangan was unanimously believed to have been the place of his birth, though suggested it was unlikely, but not impossible, that the family had travelled to Dublin for his baptism. A pillar was erected in his honour near Dangan in 1817. The place of his birth has been much disputed following his death. Sir Bernard Burke wrote in 1873:
Isn't it remarkable that until recently all the old memoirs of the Duke of Wellington seemed to infer that County Meath was the place of birth. Nowadays the theory that he was born in Dublin is generally accepted but by no means proved. Other places that have been put forward as the location of his birth include a coach between Meath and Dublin, the Dublin packet boat and the Wellesley townhouse in Trim, County Meath.
Childhood
Wellesley spent most of his childhood at his family's two homes, the first a large house in Dublin, Mornington House, and the second Dangan Castle, 3 miles (5 km) north of Summerhill in County Meath. In 1781 his father died and his eldest brother, Richard, inherited his father's earldom. Wellesley went to the diocesan school in Trim when at Dangan, Mr Whyte's Academy when in Dublin, and Brown's School in Chelsea when in London. He then enrolled at Eton College, where he studied from 1781 to 1784. His loneliness there caused him to hate it, and makes it highly unlikely that he actually said "The Battle of Waterloo was won on the playing fields of Eton", a quotation which is often attributed to him. Moreover, Eton had no playing fields at the time. In 1785, a lack of success at Eton, combined with a shortage of family funds due to his father's death, forced the young Wellesley and his mother to move to Brussels. Until his early twenties, Arthur showed little sign of distinction and his mother grew increasingly concerned at his idleness, stating, "I don't know what I shall do with my awkward son Arthur." In 1786, Wellesley enrolled in the French Royal Academy of Equitation in Angers, where he progressed significantly, becoming a good horseman and learning French, which later proved very useful. Upon returning to England later the same year, he astonished his mother with his improvement.
Early military career: 1787–1796
Ireland: 1787–1793
Despite his new promise, Wellesley had yet to find a job and his family was still short of money, so upon the advice of his mother, his brother Richard asked his friend the Duke of Rutland (then Lord Lieutenant of Ireland) to consider Arthur for a commission in the Army. Soon afterward, on 7 March 1787, he was gazetted ensign in the 73rd Regiment of Foot. In October, with the assistance of his brother, he was assigned as aide-de-camp, on ten shillings a day (twice his pay as an ensign), to the new Lord Lieutenant of Ireland, Lord Buckingham. He was also transferred to the new 76th Regiment forming in Ireland and on Christmas Day, 1787, was promoted to lieutenant. During his time in Dublin his duties were mainly social; attending balls, entertaining guests and providing advice to Buckingham. While in Ireland, he overextended himself in borrowing due to his occasional gambling, but in his defence stated that "I have often known what it was to be in want of money, but I have never got helplessly into debt". On 23 January 1788 he transferred into the 41st Regiment of Foot, then again on 25 June 1789 he transferred to the 12th (Prince of Wales's) Regiment of (Light) Dragoons and, according to the military historian Richard Holmes, he also reluctantly entered politics. Shortly before the general election of 1789, he went to the rotten borough of Trim to speak against the granting of the title "Freeman" of Dublin to the parliamentary leader of the Irish Patriot Party, Henry Grattan. Succeeding, he was later nominated and duly elected as a Member of Parliament (MP) for Trim in the Irish House of Commons. Because of the limited suffrage at the time, he sat in a parliament in which at least two-thirds of the members owed their election to the landowners of fewer than a hundred boroughs. Wellesley continued to serve at Dublin Castle, voting with the government in the Irish parliament over the next two years. He became a captain on 30 January 1791 and was transferred to the 58th Regiment of Foot. On 31 October, he transferred to the 18th Light Dragoons. During this period he grew increasingly attracted to Kitty Pakenham, the daughter of Edward Pakenham, 2nd Baron Longford. She was described as being full of 'gaiety and charm'. In 1793 he proposed, but was turned down by her brother Thomas, 2nd Earl of Longford, who considered Wellesley to be a young man, in debt, with very poor prospects. An aspiring amateur musician, Wellesley, devastated by the rejection, burnt his violins in anger, and resolved to pursue a military career in earnest. He became a major by purchase in the 33rd Regiment in 1793. A few months later, in September, his brother lent him more money and with it he purchased a lieutenant-colonelcy in the 33rd.
Netherlands: 1794–1795
In 1793 Prince Frederick, Duke of York and Albany, was sent to Flanders in command of the British contingent of an allied force destined for the invasion of France. In June 1794 Wellesley with the 33rd regiment set sail from Cork bound for Ostend as part of an expedition bringing reinforcements for the army in Flanders. They arrived too late to participate, and joined the Duke of York as he was pulling back towards the Netherlands. On 15 September 1794, at the Battle of Boxtel, east of Breda, Wellesley, in temporary command of his brigade, had his first experience of battle. During General Ralph Abercromby's withdrawal in the face of superior French forces, the 33rd held off enemy cavalry, allowing neighbouring units to retreat safely. During the extremely harsh winter that followed, Wellesley and his regiment formed part of an allied force holding the defence line along the Waal River. The 33rd, along with the rest of the army, suffered heavy losses from attrition and illness. Wellesley's health was also affected by the damp environment. Though the campaign was to end disastrously, with the British army driven out of the United Provinces into the German states, Wellesley became more aware of battle tactics, including the use of lines of infantry against advancing columns, and the merits of supporting sea-power. He understood that the failure of the campaign was due in part to the faults of the leaders and the poor organisation at headquarters. He remarked later of his time in the Netherlands that "At least I learned what not to do, and that is always a valuable lesson".
=== Brief return to Britain: 1795–1796 === After returning to England in March 1795, he was reinstated as a member of the Irish parliament for Trim. He hoped to be given the position of secretary of war in the new Irish government but the new lord-lieutenant, Lord Camden, was only able to offer him the post of Surveyor-General of the Ordnance. Declining the post, he returned to his regiment, now at Southampton preparing to set sail for the West Indies. After seven weeks at sea, a storm forced the fleet back to Poole. The 33rd was given time to recuperate and a few months later, Whitehall decided to send the regiment to India. Wellesley was promoted full colonel by seniority on 3 May 1796 and a few weeks later set sail for Calcutta with his regiment.
== India: 1797–1805 == Arriving in Calcutta in February 1797, he spent five months there before being sent in August to a brief expedition to the Philippines, where he established a list of new hygiene precautions for his men to deal with the unfamiliar climate. Returning in November to India, he learnt that his elder brother Richard, now known as Lord Mornington, had been appointed as the new Governor-General of India. He travelled aboard the ship Endeavour, commanded by Captain Robert Eastwick, who recounts in detail the passage from Madras to Calcutta in his autobiographical narrative. In 1798 he changed the spelling of his surname to "Wellesley"; up to this time he was still known as Wesley, which his eldest brother considered the ancient and proper spelling.
Fourth Anglo-Mysore War: 1798–1799
As part of the campaign to extend Company rule in India, the Fourth Anglo-Mysore War broke out in 1798 against the Sultan of Mysore, Tipu Sultan. Arthur's brother Richard ordered that an armed force be sent to capture Seringapatam and defeat Tipu. During the war, rockets were used on several occasions. Wellesley was almost defeated by Tipu's Diwan, Purnaiah, at the Battle of Sultanpet Tope. Quoting Forrest,
At this point (near the village of Sultanpet, Figure 5) there was a large tope, or grove, which gave shelter to Tipu's rocketmen and had obviously to be cleaned out before the siege could be pressed closer to Srirangapattana island. The commander chosen for this operation was Col. Wellesley, but advancing towards the tope after dark on the 5th April 1799, he was set upon with rockets and musket-fires, lost his way and, as Beatson politely puts it, had to "postpone the attack" until a more favourable opportunity should offer. The following day, Wellesley launched a fresh attack with a larger force, and took the whole position without any killed in action. On 22 April 1799, twelve days before the main battle, rocketeers maneuvered to the rear of the British encampment, then 'threw a great number of rockets at the same instant' to signal the beginning of an assault by 6,000 Indian infantry and a corps of Frenchmen, all ordered by Mir Golam Hussain and Mohomed Hulleen Mir Miran. The rockets had a range of about 1,000 yards. Some burst in the air like shells. Others, called ground rockets, would rise again on striking the ground and bound along in a serpentine motion until their force was spent. According to one British observer, a young English officer named Bayly: "So pestered were we with the rocket boys that there was no moving without danger from the destructive missiles ...". He continued:
The rockets and musketry from 20,000 of the enemy were incessant. No hail could be thicker. Every illumination of blue lights was accompanied by a shower of rockets, some of which entered the head of the column, passing through to the rear, causing death, wounds, and dreadful lacerations from the long bamboos of twenty or thirty feet, which are invariably attached to them. Under the command of General George Harris, some 24,000 troops were dispatched to Madras (to join an equal force being sent from Bombay in the west). Arthur and the 33rd sailed to join them in August. After extensive and careful logistic preparation (which would become one of Wellesley's main attributes) the 33rd left with the main force in December and travelled across 250 miles (402 km) of jungle from Madras to Mysore. On account of his brother, during the journey, Wellesley was given an additional command, that of chief advisor to Nizam Ali Khan, Asaf Jah II of Hyderabad's army (sent to accompany the British force). This position was to cause friction among many of the senior officers (some of whom were senior to Wellesley). Much of this friction was put to rest after the Battle of Mallavelly, some 20 miles (32 km) from Seringapatam, in which Harris' army attacked a large part of the sultan's army. During the battle, Wellesley led his men, in a line of battle of two ranks, against the enemy to a gentle ridge and gave the order to fire. After an extensive repetition of volleys, followed by a bayonet charge, the 33rd, in conjunction with the rest of Harris's force, forced Tipu's infantry to retreat.
=== Seringapatam: 1799 === Immediately after their arrival at Seringapatam on 5 April 1799, the Battle of Seringapatam began and Wellesley was ordered to lead a night attack on the village of Sultanpettah, adjacent to the fortress to clear the way for the artillery. Because of a variety of factors including the Mysorean army's strong defensive preparations and the darkness the attack failed with 25 casualties due to confusion among the British. Wellesley suffered a minor injury to his knee from a spent musket-ball. Although they re-attacked successfully the next day, after time to scout ahead the enemy's positions, the affair affected Wellesley. He resolved "never to attack an enemy who is preparing and strongly posted, and whose posts have not been reconnoitred by daylight". Lewin Bentham Bowring gives this alternative account:
One of these groves, called the Sultanpet Tope, was intersected by deep ditches, watered from a channel running in an easterly direction about a mile from the fort. General Baird was directed to scour this grove and dislodge the enemy, but on his advancing with this object on the night of the 5th, he found the tope unoccupied. The next day, however, the Mysore troops again took possession of the ground, and as it was absolutely necessary to expel them, two columns were detached at sunset for the purpose. The first of these, under Colonel Shawe, got possession of a ruined village, which it successfully held. The second column, under Colonel Wellesley, on advancing into the tope, was at once attacked in the darkness of night by a tremendous fire of musketry and rockets. The men, floundering about amidst the trees and the water-courses, at last broke, and fell back in disorder, some being killed and a few taken prisoners. In the confusion Colonel Wellesley was himself struck on the knee by a spent ball, and narrowly escaped falling into the hands of the enemy. A few weeks later, after extensive artillery bombardment, a breach was opened in the main walls of the fortress of Seringapatam. An attack led by Major-general David Baird secured the fortress. Wellesley secured the rear of the advance, posting guards at the breach and then stationed his regiment at the main palace. After hearing news of the death of the Tipu Sultan, Wellesley was the first at the scene to confirm his death, checking his pulse. Over the coming day, Wellesley grew increasingly concerned over the lack of discipline among his men, who drank and pillaged the fortress and city. To restore order, several soldiers were flogged and four hanged. After battle and the resulting end of the war, the main force under General Harris left Seringapatam and Wellesley, aged 30, stayed behind to command the area as the new Governor of Seringapatam and Mysore. While in India, Wellesley was ill for a considerable time, first with severe diarrhoea from the water and then with fever, followed by a serious skin infection caused by trichophyton.
=== Dhondia Wagh insurgency: 1800 === In 1800, whilst serving as Governor of Mysore, Wellesley was tasked with putting down an insurgency led by Dhondia Wagh, formerly a Patan trooper for Tipu Sultan. Having escaped after the fall of Seringapatam he became a powerful brigand, raiding villages along the Maratha–Mysore border region. Despite initial setbacks, the East India Company having pursued and destroyed his forces once already, forcing him into retreat in August 1799, he raised a sizeable force composed of disbanded Mysore soldiers, captured small outposts and forts in Mysore, and was receiving the support of several Maratha killedars opposed to British occupation. This drew the attention of the British administration, who were beginning to recognise him as more than just a bandit, as his raids, expansion and threats to destabilise British authority suddenly increased in 1800. The death of Tipu Sultan had created a power vacuum and Wagh was seeking to fill it. Given independent command of a combined East India Company and British Army force, Wellesley ventured north to confront Wagh in June 1800, with an army of 8,000 infantry and cavalry, having learnt that Wagh's forces numbered over 50,000, although the majority (around 30,000) were irregular light cavalry and unlikely to pose a serious threat to British infantry and artillery. Throughout June–August 1800, Wellesley advanced through Wagh's territory, his troops escalading forts in turn and capturing each one with "trifling loss". The forts generally offered little resistance due to their poor construction and design. Wellesley did not have sufficient troops to garrison each fort and had to clear the surrounding area of insurgents before advancing to the next fort. On 31 July, he had "taken and destroyed Dhondiah's baggage and six guns, and driven into the Malpoorba (where they were drowned) about five thousand people". Dhondiah continued to retreat, but his forces were rapidly deserting, he had no infantry and due to the monsoon weather flooding river crossings he could no longer outpace the British advance. On 10 September, at the Battle of Conagul, Wellesley personally led a charge of 1,400 British dragoons and Indian cavalry, in single line with no reserve, against Dhondiah and his remaining 5,000 cavalry. Dhondiah was killed during the clash; his body was discovered and taken to the British camp tied to a cannon. With this victory, Wellesley's campaign was concluded, and British authority had been restored. Wellesley then paid for the future upkeep of Dhondiah's orphaned son.
=== Planned expedition against Batavia and Mauritius: 1801 === Wellesley was in charge of raising an Anglo-Indian expeditionary force in Trincomali in early 1801 for the capture of Batavia and Mauritius from the French. However, on the eve of its departure, orders arrived from England that it was to be sent to Egypt to co-operate with Sir Ralph Abercromby in the expulsion of the French from Egypt. Wellesley had been appointed second in command to Baird, but owing to ill health did not accompany the expedition on 9 April 1801. This was fortunate for Wellesley, since the vessel on which he was to have sailed sank in the Red Sea. He was promoted to brigadier-general on 17 July 1801. He took residence within the Sultan's summer palace and reformed the tax and justice systems in his province to maintain order and prevent bribery.
Second Anglo-Maratha War: 1802–1803
In September 1802 Wellesley learnt that he had been promoted to the rank of major general. He had been gazetted on 29 April 1802, but the news took several months to reach him by sea. He remained at Mysore until November, when he was sent to command an army in the Second Anglo-Maratha War. When he determined that a long defensive war would ruin his army, Wellesley decided to act boldly to defeat the numerically larger force of the Maratha Empire. With the logistic assembly of his army complete (24,000 men in total) he gave the order to break camp and attack the nearest Maratha fort on 8 August 1803. The fort surrendered on 12 August after an infantry attack had exploited an artillery-made breach in the wall. With the fort now in British control Wellesley was able to extend control southwards to the Godavari River.
Splitting his army into two forces to pursue and locate the main Marathas army (the second force, commanded by Colonel Stevenson was far smaller), Wellesley was preparing to rejoin his forces on 24 September. His intelligence, however, reported the location of the Marathas' main army, between two rivers near Assaye. If he waited for the arrival of his second force, the Marathas would be able to mount a retreat, so Wellesley decided to launch an attack immediately. On 23 September Wellesley led his forces over a ford in the river Kaitna and the Battle of Assaye commenced. After crossing the ford the infantry was reorganised into several lines and advanced against the Maratha infantry. Wellesley ordered his cavalry to exploit the flank of the Maratha army just near the village. During the battle Wellesley himself came under fire; two of his horses were shot from under him and he had to mount a third. At a crucial moment, Wellesley regrouped his forces and ordered Colonel Maxwell (later killed in the attack) to attack the eastern end of the Maratha position while Wellesley himself directed a renewed infantry attack against the centre. An officer in the attack wrote of the importance of Wellesley's personal leadership: "The General was in the thick of the action the whole time ... I never saw a man so cool and collected as he was ... though I can assure you, till our troops got the order to advance the fate of the day seemed doubtful ..." With some 6,000 Marathas killed or wounded, the enemy was routed, though Wellesley's force was in no condition to pursue. British casualties were heavy: the British losses amounted to 428 killed, 1,138 wounded and 18 missing (the British casualty figures were taken from Wellesley's own despatch). Wellesley was troubled by the loss of men and remarked that he hoped "I should not like to see again such loss as I sustained on 23 September, even if attended by such gain". Years later, however, he remarked that Assaye and not Waterloo was the best battle he ever fought. Despite the damage done to the Maratha army, the battle did not end the war. A few months later in November, Wellesley attacked a larger force near Argaum, leading his army to victory again, with an astonishing 5,000 enemy dead at the cost of only 361 British casualties. A further successful attack at the fortress at Gawilghur, combined with the victory of General Gerard Lake at Delhi, forced the Maratha to sign a peace settlement at Anjangaon (not concluded until a year later) called the Treaty of Surji-Anjangaon. Military historian Richard Holmes remarked that Wellesley's experiences in India had an important influence on his personality and military tactics, teaching him much about military matters that would prove vital to his success in the Peninsular War. These included a strong sense of discipline through drill and order, the use of diplomacy to gain allies, and the vital necessity of a secure supply line. He also established high regard for the acquisition of intelligence through scouts and spies. His personal tastes also developed, including dressing himself in white trousers, a dark tunic, with Hessian boots and black cocked hat (that later became synonymous as his style).
Leaving India: 1804–1805
Wellesley grew tired of his time in India, remarking, "I have served as long in India as any man ought who can serve anywhere else". In June 1804 he applied for permission to return home and as a reward for his service in India he was made a Knight of the Bath in September. While in India, Wellesley had amassed a fortune of £42,000 (equivalent to £4.2 million in 2024), consisting mainly of prize money from his campaign. When his brother's term as Governor-General of India ended in March 1805, the brothers returned together to England on HMS Howe. Wellesley, coincidentally, stopped on his voyage at the island of Saint Helena and stayed in the same building in which Napoleon would live during his later exile.
Return to Britain: 1805–1808
=== Meeting Nelson === In September 1805, Wellesley was newly returned from his campaigns in India and was not yet particularly well known to the public. He reported to the office of the Secretary of State for War and the Colonies to request a new assignment. In the waiting room, he met Vice-admiral Horatio Nelson, already a known figure after his victories at the Nile and Copenhagen, who was briefly in England after months pursuing the French Toulon fleet to the West Indies and back. Some 30 years later, Wellington recalled a conversation that Nelson began with him which Wellesley found "almost all on his side in a style so vain and silly as to surprise and almost disgust me". Nelson left the room to inquire who the young general was, and on his return switched to a very different tone, discussing the war, the state of the colonies, and the geopolitical situation as between equals. On this second discussion, Wellington recalled, "I don't know that I ever had a conversation that interested me more". This was the only time that the two men met; Nelson was killed at his victory at Trafalgar seven weeks later. Wellesley then served in the abortive Anglo-Russian expedition to north Germany in 1805, taking a brigade to Elbe. He then took a period of extended leave from the army and was elected as a Tory member of the British parliament for Rye in January 1806. A year later, he was elected the member of Parliament for Newport on the Isle of Wight, and was then appointed to serve as Chief Secretary for Ireland under the Duke of Richmond. At the same time, he was made a privy counsellor. While in Ireland, he gave a verbal promise that the remaining Penal Laws would be enforced with great moderation, perhaps an indication of his later willingness to support Catholic emancipation. Wellesley was described as having been "handsome, very brown, quite bald and a hooked nose".
=== Marriage to Kitty Pakenham === Wellesley was married by his brother Gerald, a clergyman, to Kitty Pakenham in St George's Church, Dublin, on 10 April 1806. They had two children: Arthur was born in 1807 and Charles was born in 1808. The marriage proved unsatisfactory and the two spent years apart, while Wellesley was campaigning and afterwards. Kitty grew depressed, and Wellesley pursued other sexual and romantic partners. The couple largely lived apart, with Kitty spending most of her time at their country home, Stratfield Saye House, and Wellesley at their London home, Apsley House. Kitty's brother Edward Pakenham served under Wellesley throughout the Peninsular War, and Wellesley's regard for him helped to smooth his relations with Kitty, until Pakenham's death at the Battle of New Orleans in 1815.
War against Denmark–Norway
Wellesley was in Ireland in May 1807 when he heard of the British expedition to Denmark–Norway. He decided to go, while maintaining his political appointments, and was appointed to command an infantry brigade in the Second Battle of Copenhagen, which took place in August. He fought at Køge, during which the men under his command took 1,500 prisoners, with Wellesley later present during the surrender. By 30 September he had returned to England and was raised to the rank of lieutenant general on 25 April 1808. In June 1808 he accepted the command of an expedition of 9,000 men. Preparing to sail for an attack on the Spanish colonies in South America (to assist the Latin American patriot Francisco de Miranda) his force was instead ordered to sail for the Kingdom of Portugal, to take part in the Peninsular Campaign and rendezvous with 5,000 troops from Gibraltar.
Peninsular War: 1808–1814
=== Vimeiro and the Convention of Sintra: 1808 === Ready for battle, Wellesley left Cork on 12 July 1808 to participate in the war against French forces in the Iberian Peninsula, with his skills as a commander tested and developed. According to the historian Robin Neillands:
Wellesley had by now acquired the experience on which his later successes were founded. He knew about command from the ground up, about the importance of logistics, about campaigning in a hostile environment. He enjoyed political influence and realised the need to maintain support at home. Above all, he had gained a clear idea of how, by setting attainable objectives and relying on his own force and abilities, a campaign could be fought and won.
Wellesley defeated the French at the Battle of Roliça and the Battle of Vimeiro in 1808 but was superseded in command immediately after the latter battle. General Dalrymple then signed the controversial Convention of Sintra, which stipulated that the Royal Navy transport the French army out of Lisbon with all their loot, and insisted on the association of the only available government minister, Wellesley. Dalrymple and Wellesley were recalled to Britain to face a Court of Enquiry. Wellesley had agreed to sign the preliminary armistice, but had not signed the convention, and was cleared. Simultaneously, Napoleon entered Spain with his veteran troops to put down the revolt; the new commander of the British forces in the Peninsula, Sir John Moore, died during the Battle of Corunna in January 1809. Although overall the land war with France was not going well from a British perspective, the Peninsula was the one theatre where they, with the Portuguese, had provided strong resistance against France and her allies. This contrasted with the disastrous Walcheren expedition, which was typical of the mismanaged British operations of the time. Wellesley submitted a memorandum to Lord Castlereagh on the defence of Portugal. He stressed its mountainous frontiers and advocated Lisbon as the main base because the Royal Navy could help to defend it. Castlereagh and the cabinet approved the memo and appointed him head of all British forces in Portugal.
=== Talavera campaign: 1809 === Wellesley arrived in Lisbon on 22 April 1809 on board HMS Surveillante, after narrowly escaping shipwreck. Reinforced, he took to the offensive. In the Second Battle of Porto he crossed the Douro river in a daylight coup de main, and routed Marshal Jean-de-Dieu Soult's French troops in Porto. With Portugal secured, Wellesley advanced into Spain to unite with General Cuesta's forces. The combined allied force prepared for an assault on Marshal Claude-Victor Perrin's I Corps at Talavera, 23 July. Cuesta, however, was reluctant to agree, and was only persuaded to advance on the following day. The delay allowed the French to withdraw, but Cuesta sent his army headlong after Victor, and found himself faced by almost the entire French army in New Castile—Victor had been reinforced by the Toledo and Madrid garrisons. The Spanish retreated precipitously, necessitating the advance of two British divisions to cover their retreat. The next day, 27 July, at the Battle of Talavera the French advanced in three columns and were repulsed several times throughout the day by Wellesley, but at a heavy cost to the British force. In the aftermath Marshal Soult's army was discovered to be advancing south, threatening to cut Wellesley off from Portugal. Wellesley moved east on 3 August to block it, leaving 1,500 wounded in the care of the Spanish, intending to confront Soult before finding out that the French were in fact 30,000 strong. The British commander sent the Light Brigade on a dash to hold the bridge over the Tagus at Almaraz. With communications and supply from Lisbon secured for now, Wellesley considered joining with Cuesta again but found out that his Spanish ally had abandoned the British wounded to the French and was thoroughly uncooperative, promising and then refusing to supply the British forces, aggravating Wellesley and causing considerable friction between the British and their Spanish allies. The lack of supplies, coupled with the threat of French reinforcement (including the possible inclusion of Napoleon himself) in the spring, led to the British deciding to retreat into Portugal. Following his victory at Talavera, Wellesley was elevated to the Peerage of the United Kingdom on 26 August 1809 as Viscount Wellington of Talavera and of Wellington, in Somerset, with the subsidiary title of Baron Douro of Wellesley.
=== Ciudad Rodrigo and stalemate: 1810–1812 === In 1810 a newly enlarged French army under Marshal André Masséna invaded Portugal. British opinion was negative and there were suggestions to evacuate Portugal. Instead, Lord Wellington first slowed the French at Buçaco; he then prevented them from taking the Lisbon Peninsula by the construction of massive earthworks, known as the Lines of Torres Vedras, which had been assembled in complete secrecy with their flanks guarded by the Royal Navy. The baffled and starving French invasion forces retreated after six months. Wellington's pursuit was hindered by a series of reverses inflicted by Marshal Michel Ney in a much-lauded rear guard campaign. In 1811 Masséna returned towards Portugal to relieve Almeida; Wellington narrowly checked the French at the Battle of Fuentes de Oñoro. Simultaneously, his subordinate, Viscount Beresford, fought Soult's 'Army of the South' to a bloody stalemate at the Battle of Albuera in May. Wellington was promoted to full general on 31 July for his services. The French abandoned Almeida, avoiding British pursuit, but retained the twin Spanish fortresses of Ciudad Rodrigo and Badajoz, the 'Keys' guarding the roads through the mountain passes into Portugal.
In 1812 Wellington finally captured Ciudad Rodrigo via a rapid movement as the French went into winter quarters, storming it before they could react. He then moved south quickly, besieged the fortress of Badajoz for a month and captured it during the night on 6 April 1812. On viewing the aftermath of the Storming of Badajoz, Wellington lost his composure and cried at the sight of the British dead in the breaches. His army now was a veteran British force reinforced by units of the retrained Portuguese army. Campaigning in Spain, he was made Earl of Wellington in the county of Somerset on 22 February 1812. He routed the French at the Battle of Salamanca, taking advantage of a minor French mispositioning. The victory liberated the Spanish capital of Madrid. He was later made Marquess of Wellington, in the said county on 18 August 1812. Wellington attempted to take the vital fortress of Burgos, which linked Madrid to France. He failed, due in part to a lack of siege guns, forcing him into a headlong retreat with the loss of over 2,000 casualties. The French abandoned Andalusia, and combined the troops of Soult and Auguste de Marmont. Thus combined, the French outnumbered the British, putting the British forces in a precarious position. Wellington withdrew his army and, joined by the smaller corps under the command of Rowland Hill, which had been moved to Madrid, began to retreat to Portugal. Marshal Soult declined to attack.
=== Victory: 1813–1814 === In 1813 Wellington led a new offensive, this time against the French line of communications. He struck through the hills north of Burgos, the Tras os Montes, and switched his supply line from Portugal to Santander on Spain's north coast; this led to the French abandoning Madrid and Burgos. Continuing to outflank the French lines, Wellington caught up with and routed the army of King Joseph Bonaparte in the Battle of Vitoria, for which he was promoted to field marshal on 21 June. He personally led a column against the French centre, while other columns commanded by Sir Thomas Graham, Rowland Hill and the Earl of Dalhousie looped around the French right and left (this battle became the subject of Beethoven's orchestral piece Wellington's Victory (Opus 91). The British troops broke ranks to loot the abandoned French wagons instead of pursuing the beaten foe. When troops failed to return to their units and began harassing the locals, an enraged Wellington wrote in a now famous despatch to Earl Bathurst, "We have in the service the scum of the earth as common soldiers". Although later, when his temper had cooled, he extended his comment to praise the men under his command saying that though many of the men were, "the scum of the earth; it is really wonderful that we should have made them to the fine fellows they are". After taking the small fortresses of Pamplona, Wellington invested San Sebastián but was frustrated by the obstinate French garrison, losing 693 dead and 316 captured in a failed assault and suspending the siege at the end of July. Soult's relief attempt was blocked by the Spanish Army of Galicia at San Marcial, allowing the Allies to consolidate their position and tighten the ring around the city, which fell in September after a second spirited defence. Wellington then forced Soult's demoralised and battered army into a fighting retreat into France, punctuated by battles at the Pyrenees, Bidassoa and Nivelle. Wellington invaded southern France, winning at the Nive and Orthez. Wellington's final battle against his rival Soult occurred at Toulouse, where the Allied divisions were badly mauled storming the French redoubts, losing some 4,600 men. Despite this momentary victory, news arrived of Napoleon's defeat and abdication and Soult, seeing no reason to continue the fighting, agreed on a ceasefire with Wellington, allowing Soult to evacuate the city. Hailed as the conquering hero by the British, on 3 May 1814 Wellington was made Duke of Wellington, in the county of Somerset, together with the subsidiary title of Marquess Douro, in said County. On 21 July 1814, the Prince Regent hosted a magnificent fête in Wellington's honour at Carlton House, attended by over 2,000 guests. The celebration was held in a temporary structure designed by John Nash—a 24-sided wooden rotunda with an innovative self-supporting roof that created a luminous, tent-like space for the festivities. The event marked the social pinnacle of Wellington's triumph, with the structure later being relocated to Woolwich Common to house the Royal Artillery Museum. He received some recognition during his lifetime (the title of "Duque de Ciudad Rodrigo" and "Grandee of Spain") and the Spanish King Ferdinand VII allowed him to keep part of the works of art from the Royal Collection which he had recovered from the French. His equestrian portrait features prominently in the Monument to the Battle of Vitoria, in present-day Vitoria-Gasteiz.
