The system of organisation, drill, and tactics for Light Troops introduced into the Regiment by Baron de Rottenburg, was embodied in a Manual for Riflemen and Light Infantry. This volume[12] was published in August, 1798, with a preface signed by the Adjutant General, and especially commended to the Army by the Commander-in-Chief as a text book on the subject. In 1799 a 6th Battalion was added to the Regiment, so that the close of the eighteenth century saw the Regiment composed of six battalions. ----- Footnote 9: Lieut.-Colonel Marc Prevost, born 1736, died 1785, youngest brother of General Augustine Prevost—a brilliant and most promising officer, who succumbed to the effect of his wounds. Footnote 10: Frederick, Duke of York, was the second son of George III, and brother of George IV and William IV. Footnote 11: Afterwards Lieutenant-General. Born 1760, died 1832. He commanded the 5th Battalion, 1797–1808. He afterwards served as Major-General commanding in Lower Canada, 1810–1815, during the American War, 1812–13. Footnote 12: _Regulations for the Exercise of Riflemen and Light Infantry and Instructions for their conduct in the Field_, with diagrams, published with a Memo, dated Horse Guards, August 1st, 1798. Copies of the editions 1808 and 1812 will be found in the Library, Royal United Service Institution, Whitehall. III. 1808–1824.—PENINSULAR WAR. 60TH THE ROYAL AMERICAN REGIMENT BECOMES 60TH THE DUKE OF YORK’S OWN RIFLE CORPS. In 1808 Great Britain determined to take the offensive against France, and, by occupying Portugal, endeavour to drive Napoleon and the French from the Peninsula of Spain and Portugal. [Sidenote: Aug. 17th, 1808, ROLEIA] [Sidenote: Aug. 21st, 1808, VIMIERA.] Thus began the Peninsular War, so full of glorious memories for the British Army. The 5th Battalion, under the command of Major Davy,[13] formed part of the force despatched under _Sir Arthur Wellesley_ to Portugal, and in conjunction with the 2nd Battalion of the 95th[14] opened the campaign at Obidos on the 15th of August; and two days later took part in the fight of ROLEIA. The services of the Battalion as Light Troops or Riflemen were valued so highly by the Commander of the forces, and so important was their example, that in a very complimentary order he directed its distribution by companies among the several brigades of the army. Thus it came to be engaged in nearly all the great battles throughout the war, starting brilliantly with the battle of VIMIERA,[15] where a signal victory was gained over the French under General Junot. _Wellesley_ was shortly afterwards superseded by Sir Harry Burrard[16] and _Sir Hew Dalrymple_, who ended the campaign by the Convention of Cintra, under the terms of which the French evacuated Portugal. [Sidenote: Jan. 16th, 1809, CORUNNA.]