Captain Doyle was promoted on the 21st of March 1782 to the rank of Major in the “Volunteers of Ireland,” which corps at this period was numbered the One hundred and fifth regiment. Major Doyle formed a corps of light cavalry from amongst the backwoodsmen, with which he rendered essential service to the army, and was again severely wounded. In the expedition against General Marion he charged the State regiment of Carolina dragoons with his advanced corps of seventy horse, the killed, wounded, and prisoners of the enemy exceeding his whole force. The American War shortly afterwards terminated, and the One hundred and fifth regiment was ordered to Ireland, when Major Doyle was entrusted with public despatches to the ministers. Peace having now taken place, Major Doyle entered upon a new scene of action, and was returned member for Mullingar in the Irish parliament of 1782, when his exertions were devoted to the improvement of the establishment in Ireland, similar to Chelsea Hospital, for the relief of disabled and worn-out soldiers. The One hundred and fifth regiment was disbanded in 1784, and Major Doyle remained on half-pay from the 25th of June of that year until the war of the French Revolution in 1793, when he offered to raise a regiment of his countrymen for the service of Government; and his Royal Patron honored the corps with the appellation of “The Prince of Wales’s Irish Regiment,” and it was numbered the EIGHTY-SEVENTH, of which Major Doyle was appointed Lieut.-Colonel Commandant on the 18th of September 1793, and with which he proceeded in the following year to the Continent, with the force commanded by Major-General the Earl of Moira, under whom (as Lord Rawdon) he had served in America. Lieut.-Colonel Doyle served during the campaign of 1794 under His Royal Highness the Duke of York, and repulsed an attack of the enemy at Alost, on the 15th of July of that year, after having been twice severely wounded, being the first individual of the regiment who was wounded. His conduct was honorably noticed in His Royal Highness’s despatch. Lieut.-Colonel Doyle next proceeded to Antwerp, and ultimately to England for the recovery of his wounds, when he was afterwards appointed Secretary-at-War in Ireland. In consequence of the reduction of the Prince of Wales’s household, Lieut.-Colonel Doyle lost the appointment of Secretary to His Royal Highness; but, notwithstanding this decrease of income, he closed his political career by a mark of generosity worthy of being recorded. His regiment being still prisoners in France, under the circumstances narrated at page 6., he collected their wives and families, and distributed five hundred pounds amongst them.