The 8th Line Battalion of the King's German Legion was raised during the year 1806 as the last out of eight line battalions that the Legion levied in total. It was only half completed when the British Expeditionary force withdrew from Hanover early 1806 and subsequently filled up as recruits became available. The battalion was initially brigaded with the of the Legion. It served from 1805 until 1816 in Ireland, Walcheren, Copenhagen, Sicily, Peninsula and Belgium.