The 12th Battalion Border Regiment was formed as reserve battalion from the Depot Companies of the 11th Border Regiment at Prees Heath on 26 May 1915 and remained in the UK supplying drafts to the 11th (Lonsdale) Battalion. On 1 September 1916 the battalion was absorbed into the 75th Training Reserve Battalion of 17th Reserve Brigade.
The 12th Battalion World War One casualty list has been compiled using the publication Soldiers Died in the Great War 1914-19, Volume 39, The Border Regiment and cross-referenced with the Commonwealth War Graves Commission database. The number of casualties compiled to date does not necessarily reflect the total number of casualties for this battalion due to the possibility of missed names and the (current) exclusion of officers and other ranks that were attached to the Border Regiment. Please note there are only five casualties in this list.
For the 12th Battalion roll of honour, see 12th Battalion Border Regiment Casualty List.