After the relief of the Siege of Derry in 1689 the regiment continued its pursuance of the Williamite Wars. On 19 June an attempt was made to force contact with Jacobite forces under the command of Brigadier Sutherland. The "Enniskilliners" came upon a force of horse and foot at the churchyard of Belturbet and what followed is described by Thomas Witherow:"Tuesday proved to be a day of incessant rain, so that all military operations were for the time suspended; but a Council of War was held by the Enniskilleners, and, as it was in vain to think of overtaking Sutherland, it was resolved to attack the party in Belturbet. Next day, Wednesday the 19th of June, they marched forward, and when within two miles of the town, the dragoons of both parties came in sight of each other. After an exchange of shots, the horse of the enemy were driven back and pursued into Belturbet, and the Enniskillen horse surrounding the church and churchyard, kept them there till the foot came forward and secured possession of the adjoining buildings. Having taken up their position in the houses overtopping the churchyard, they so galled the garrison with their shot that at the end of two hours it consented to surrender. The conditions were that all the prisoners should have their lives, and that the officers, in addition, should be allowed to retain their clothes and money. The result was that nearly three hundred prisoners and a great booty fell to the victors, consisting of two barrels of powder, seven hundred muskets, fifty-three dragoon horses, and as many red coats as served for two companies. In addition, a great quantity of provisions amounting to twenty tons of bread, flour, wheat, and malt, was sent to Enniskillen by water. Thirteen commissioned officers were detained as prisoners, but the two hundred common soldiers were taken to Enniskillen, and were employed in erecting the fort, which was then approaching completion."