In 1748 the Thirteenth was once more transferred to Ireland, and there it remained for a second score of years. A Dragoon Regiment at this time seems to have been very weak in numbers, considerably under two hundred all told, officers and men, with one hundred and fifty horses. The prohibition against Irishmen had apparently been withdrawn, and by 1767 the men were almost all Irish. But none were Roman Catholics, the enlistment of these being still absolutely forbidden. The men were fine, most of them from five foot nine to five foot eleven, and “tolerably well appointed.” The officers too were mostly Irish. The barrack accommodation was still very poor, and the Regiment was scattered in detachments as before. The arms were very bad at times.

About 1777 the Thirteenth were converted into Light Dragoons, and much smaller men were enlisted. The example of Frederick the Great was now being followed on the Continent, and Cavalry was being trained for greater speed and hand-to-hand fighting. The Infantry firearm of the Thirteenth gave place to a short carbine, and some changes were made in the uniform, the old three-cornered hat making way for a Cavalry helmet. Bayonets were still carried, but evidently there was some idea of making the Dragoon more of a horseman and less of a foot soldier.

Nevertheless the state of the British Cavalry at that time as to equipment and drill was very antiquated. “The military value of their training,” says Barrett, “was practically nil.” And, to add to their disadvantages, they were now cursed with the system of “proprietary Colonels.” How this system came about is not clear, but towards the end of the eighteenth century it was in full force. In Munden’s day the Colonel had been “the active officer in command, and always present, unless on leave, whether at home or in the field.” Sixty years later, when the old traditions of Marlborough’s time had been lost, the Regiment was really commanded by the Lieutenant-Colonel, while the Colonel had become an absentee, seeing the Regiment perhaps once or twice a year. Yet it was in a sense looked upon as his private property. “The system,” says Barrett, “was a bad one. To bad Colonels were due the crying abuses of the pay system as well as those of the clothing system—the systematic robbery of the soldier, the mean frauds by which an income was literally swindled out of Government or sweated off the backs of the men; and the abuse of the power of the lash was owing to the same cause.” In 1787 the Colonel of the Thirteenth, a member of Parliament, “lived mainly in London while the Regiment was in Ireland.” Arms were bad, desertions frequent, and the duties of the Regiment consisted chiefly of hunting down members of the various lawless societies in Ireland, Whiteboys and Peep-o’-Day Boys, and the like. In spite of all these heartbreaking drawbacks the regimental officers seem to have done something to make the men efficient, for at times the reports of inspecting Generals are good enough, though evidently the standard was not high; and in 1794, no doubt because of the French Revolution and the outbreak of war on the Continent, the strength had been increased to 446 men and 393 horses.

The Thirteenth, however, was not yet to be employed in the Continental war. It was now, after its two campaigns against the Jacobites, followed by fifty years of peace duty, to have its first taste of service abroad, but this was not to be in warfare against a civilised enemy.

In the island of Jamaica the “Maroons,” originally runaway negro slaves, had long been giving trouble, and it had now become urgently necessary to suppress them. They held a difficult mountain country, full of densely wooded glens, from which they had been wont for many years to raid the lowlands and plantations, plundering and murdering. After some partial settlements they had again risen, and had openly defied the white men to war. Their numbers were not large, perhaps 1200 all told, but as Great Britain was already fighting the French in the West Indies the complication was serious, and Lord Balcarres, the Governor, was assembling a considerable force to blockade the revolted highlands.

It is remarkable to find, considering the nature of the ground, that in addition to three Regiments of Infantry and some local militia, this force was to consist of five Dragoon Regiments, of which two were the Thirteenth and Fourteenth Light Dragoons.

The Thirteenth was brought over from Ireland to England in 1795, and a couple of troops sailed for Jamaica in advance, the remainder of the Regiment remaining in England until the following February, when, on the 9th of the month, the Headquarters sailed in the Concord, which formed part of a fleet numbering more than five hundred sail. In spite of all the circumstances of its peace service, the Regiment seems then to have been in a condition of discipline and efficiency very creditable to officers and men. Fortunate that this was so, for both were soon to be severely tested. A violent storm scattered the fleet three days after sailing, and in the Bay of Biscay the Concord took fire, some pitch used for fumigation having been upset by the rolling of the vessel, and blazed up. As the fire was immediately over nineteen casks of powder, the danger was great. It is pleasant to read how the ship’s company behaved in this sudden contingency. The Captain, who was writing in his cabin, ran on deck “with his pen across his mouth.” An officer was sent down to the hold to cover the powder barrels with wet blankets and mattresses. “Scores of men, with their mattresses held in front of them,” threw themselves on the flames and smothered them, while the officer below spread a sailcloth over the barrels and kept it wet under a shower of sparks from the deck above. Eventually, after really heroic exertions, the fire was brought under, and the ship escaped destruction. Soon afterwards she sprang a leak, and had to put back to Cove, but all damage was set to rights in a few days, and on the 26th February the fleet put to sea again. This time all went well, and on the 1st April the fleet was assembled in Barbadoes.

After a short stay there, the Thirteenth was sent on to San Domingo, in which island it remained for some months, helping to put down a rising of brigands. While doing this work the Regiment, which till then had been very healthy, was attacked by the scourge of the West Indies—yellow fever. Much has been written about the awful ravages of the disease in those days. It is only necessary to say here that the Thirteenth suffered as others did. Men died daily, and at last the Regiment was so reduced that it had to apply to the Fifty-sixth Foot for help to bury its dead. How many were left alive does not appear, but by the end of the year the remains of the Regiment had arrived in Jamaica.

It is not easy to follow in detail the course of the campaign against the Maroons; but it seems that though only two troops of the Thirteenth were employed in it, the command of the whole expedition was eventually given to Lieut.-Colonel the Hon. George Walpole of this Regiment, and that after some hard jungle fighting and mutual ambuscades the Maroons surrendered to him, on a promise that they should not be deported. The Jamaica Government broke this engagement, and voted Walpole a sword of honour, which in the circumstances was naturally declined.

The Regiment remained in the West Indies until August 1798, when, after transferring some 95 men to the Jamaica Dragoons, all that were left, 52 in number, chiefly non-commissioned officers, sailed under the command of a Lieutenant for England. Of these 52, many were found on arrival to be totally unfit for service, and were invalided. Most of those not immediately invalided were “completely exhausted and worn out,” and were gradually discharged. The Regiment had in fact ceased to exist. During the two years and six months of its absence, though it had lost only one man killed in action, it had left behind it, dead of disease, 19 officers, 7 quartermasters, 2 volunteers, and 287 non-commissioned officers and men. Such were the conditions of service at that time in the West Indies.