Salamanca was the most decisive battle of the entire Peninsular War. Wellington smashed Marmont's French Army and his pursuit of its shattered remnants led to the famous cavalry charge of the King's German Legion at Garcia Hernandez. There would be two more years of sieges and hard fighting before the Iron Duke crossed the Pyrenees into France but from Salamanca the British and their Portuguese and Spanish allies always had the upper hand. Ian Fletcher examines this important battle in detail and also discusses the campaign which led up to it.