The forces which Wellington led in Portugal and Spain and up into southern France between 1808 and 1814 achieved a consistent record of victory perhaps unmatched in the history of the British Army. Some 40 per cent of this volunteer army were Irishmen – a remarkable figure, given the recent unrest and bloodshed in Ireland. This book details the record, and illustrates the uniforms and equipment, of the two cavalry and three infantry units boasting formal Irish identity: the 4th (Royal Irish) Dragoon Guards, 18th Hussars, 27th (Enniskillen), 87th (Prince of Wales's Own Irish), and 88th (Connaught Rangers) Regiments of Foot.