The disturbed state of affairs on the continent of Europe in 1793, particularly in France, arising from the principles of the Revolution in that country, which threatened surrounding nations with universal anarchy, occasioned preparations to be made throughout the several countries, in order to oppose the dangerous doctrines which were then diffused under the specious terms of “Liberty and Equality.” On the 1st of February 1793, the National Convention of France, after the decapitation of King Louis XVI. on the 21st of the previous month, declared war against Great Britain and Holland. Augmentations were immediately made to the regular army, the militia was embodied, and the British people evinced their loyalty and patriotism by forming volunteer associations, and by making every exertion for the maintenance of monarchical principles, and for the defence of those institutions which had raised their country to a high position among the nations of Europe. Upwards of fifty regiments of infantry were authorised to be raised, on this emergency, in the several parts of Great Britain and Ireland, by officers and gentlemen possessing local influence, sixteen of which regiments, viz. from the Seventy-eighth to the Ninety-third, continue at this period on the establishment of the army. Of the officers thus honored with the confidence of their Sovereign and his Government, Lieut.-Colonel John Doyle (afterwards General Sir John Doyle, Bart., and G.C.B.) was selected, to whom a letter of service was addressed on the 18th of September 1793, authorising him to raise a regiment, to consist of ten companies of sixty rank and file in each company. The corps was speedily completed, and was designated the EIGHTY-SEVENTH, or THE PRINCE OF WALES’S IRISH REGIMENT. The following is a copy of the _Letter of Service_, addressed by the Secretary-at-War to Major John Doyle, on the half-pay of the late One hundred and fifth regiment, dated “_War Office,_ “_18th September 1793._ “SIR, “I am commanded to acquaint you, that His Majesty approves of your raising a regiment of foot, without any allowance of levy money, to be completed within three months, upon the following terms, viz.: