Alluding to the siege of Mangalore, Colonel Fullarton says that the garrison, under its estimable commander, Colonel Campbell, “made a defence that has seldom been equalled, and never surpassed;” and Colonel Lindsay observes, in his Military Miscellany, that “the defence of Colberg in Pomerania, by Major Heiden and his small garrison, and that of Mangalore in the East Indies, by Colonel Campbell and the second battalion of the Royal Highlanders, now the 73rd regiment, are as noble examples as any in history.” The East India Company showed a due sense of the services of the garrison, by ordering a monument to be erected to the memory of Colonel Campbell,[437] Captains Stewart and Dalyell, and those who fell at the siege, and giving a handsome gratuity to the survivors.
The battalion embarked for Tellicherri on the 4th of February 1784, where it remained till April, when it departed for Bombay. It was afterwards stationed at Dinapoor in Bengal, when, on the 18th of April 1786, the battalion was formed into a separate corps, with green facings, under the denomination of the 73rd regiment, the command of which was given to Sir George Osborne. It was at first intended to reduce the junior officers of both battalions, instead of putting all the officers of the second on half-pay; but on representations being made by the officers of both battalions, the arrangement alluded to was made to save the necessity of putting any of the officers on half-pay.
In December 1787, the 73rd removed to Cawnpore, where it remained till March 1790, when it was sent to Fort William in Bengal. Next year the regiment joined the army in Malabar, under the command of Major-General Robert Abercromby. Major Macdowall being about this time promoted to the 57th, was succeeded by Captain James Spens.
With the view of attacking Seringapatam, Lord Cornwallis directed General Abercromby to join him with all his disposable force, consisting of the 73rd, 75th, and 77th British, and seven native regiments. He accordingly began his march on the 5th of December 1791, but owing to various causes he did not join the main army till the 16th of February following. The enemy having been repulsed before Seringapatam on the 22nd, entered into preliminaries of peace on the 24th, when the war ended.
The 73rd was employed in the expedition against Pondicherry in 1793, when it formed part of Colonel David Baird’s brigade. The regiment, though much reduced by sickness, had received from time to time several detachments of recruits from Scotland, and at this period it was 800 strong. In the enterprise against Pondicherry, Captain Galpine, Lieutenant Donald Macgregor, and Ensign Tod were killed.
The 73rd formed part of the force sent against Ceylon in the year 1793, under Major-General James Stuart. It remained in the island till 1797, when it returned to Madras, and was quartered in various parts of that presidency till 1799, when it joined the army under General Harris.
This army encamped at Mallavelly on the 27th of March, on which day a battle took place with the Sultan, Tippoo, whose army was totally routed, with the loss of 1000 men, whilst that of the British was only 69 men killed and wounded. Advancing slowly, the British army arrived in the neighbourhood of the Mysore capital, Seringapatam, on the 5th of April, and took up a position preparatory to a siege, the third within the space of a few years. The enemy’s advanced troops and rocket-men gave some annoyance to the picquets the same evening, but they were driven back next morning by two columns under the Hon. Colonel Arthur Wellesley and Colonel Shaw; an attempt made by the same officers the previous evening having miscarried, in consequence of the darkness of the night and some unexpected obstructions. The Bombay army joined on the 30th, and took up a position in the line, the advanced posts being within a thousand yards of the garrison. A party of the 75th, under Colonel Hart, having dislodged the enemy on the 17th, established themselves under cover within a thousand yards of the fort; whilst at the same time, Major Macdonald of the 73rd, with a detachment of his own and other regiments, took possession of a post at the same distance from the fort on the south. On the evening of the 20th, another detachment, under Colonels Sherbrooke, St John, and Monypenny, drove 2000 of the enemy from an entrenched position within eight hundred yards of the place, with the loss of only 5 killed and wounded, whilst that of the enemy was 250 men. On the 22nd the enemy made a vigorous though unsuccessful sortie on all the advanced posts. They renewed the attempt several times, but were as often repulsed with great loss. Next day the batteries opened with such effect that all the guns opposed to them were silenced in the course of a few hours. The siege was continued with unabated vigour till the morning of the 4th of May, when it was resolved to attempt an assault. Major-General Baird, who, twenty years before, had been kept a prisoner in chains in the city he was now to storm, was appointed to command the assailants, who were to advance in two columns under Colonels Dunlop and Sherbrooke; the Hon. Colonel Arthur Wellesley commanding the reserve. The whole force amounted to 4376 firelocks. Everything being in readiness, at one o’clock in the afternoon the troops waited the signal, and on its being given they rushed impetuously forward, and in less than two hours Seringapatam was in possession of the British. The Sultan and a number of his chief officers fell whilst defending the capital. In this gallant assault, Lieutenant Lalor of the 73rd was killed, and Captain William Macleod, Lieutenant Thomas, and Ensigns Antill and Guthrie of the same regiment, were wounded.
Nothing now remained to complete the subjugation of Mysore but to subdue a warlike chief who had taken up arms in support of the Sultan. Colonel Wellesley was detached against him with the 73rd and some other troops, when his army was dispersed, and the chief himself killed in a charge of cavalry.
In 1805 the regiment was ordered home, but such of the men as were inclined to remain in India were offered a bounty. The result was that most of them volunteered, and the few that remained embarked at Madras for England, and arrived at Gravesend in July 1806. The remains of the regiment arrived at Perth in 1807, and in 1809 the ranks were filled up to 800 men, and a second battalion was added. The uniform and designation of the corps was then changed, and it ceased to be a Highland regiment.