The forces which Wellington led in Portugal and Spain and up into southern France during the Peninsular War (1808-1814) achieved a record of victory perhaps unmatched in the history of the British Army. Among his infantry the regiments of the Light Division were self-consciously an élite, trained to fight with initiative and independence on the exposed edges of the marching army. This book explains their evolution and tactics, details the campaigns in which they fought and illustrates the uniforms and equipment of the Light Infantry regiments: the 43rd (Monmouthshire), 52nd (Oxfordshire), 51st (2nd Yorkshire), 68th (Durham) and 85th (Bucks Volunteers).