The regiment was subsequently employed before _Limerick_, which city was besieged by the English army. On the 11th of August, as the regiment lay encamped near Limerick, information arrived of the destruction of the battering train on its march to join the army by a numerous body of Irish cavalry under Brigadier-General Sarsfield (formerly an officer of the English life guards); SIR ALBERT CUNNINGHAM instantly issued from the camp with two squadrons of his dragoons, and dashing across the country, intercepted one of the enemy's detachments, which he charged with signal gallantry, slew one major, one captain, and twenty men; but their main body escaped. When King William raised the siege of Limerick and returned to England, CUNNINGHAM'S dragoons were ordered into winter quarters; but were suddenly recalled in consequence of Brigadier-General Sarsfield having invested the castle of _Birr_, in the King's County:--after the flight of the enemy from before this post, they remained encamped near Birr, while additional fortifications were being raised, and subsequently went into quarters. [Sidenote: 1691] In the month of May, 1691, several ships arrived at Dublin from England with men and provisions, and great diligence was used in preparing for an early and vigorous campaign: the INNISKILLING dragoons took the field this summer, and joined the army commanded by Lieutenant-General de Ginkell, on the 6th of June, on its march towards _Ballymore_, which place was captured after a short resistance. _Athlone_ was also taken, and the army advanced against the French and Irish forces under General St. Ruth, in position near _Aghrim_, in the county of Galway, about three miles beyond Ballinasloe.