Wales Borderers. The 5th (Montgomeryshire) Volunteer Battalion ceased to be part of the South Wales Borderers, and was transferred to the Royal Welsh Fusiliers to form the bulk of the 7th (Merionethshire & Montgomeryshire) Battalion of that regiment. Unusually, the remaining TF battalion of the SWB, the Brecknockshire Battalion, was named rather than numbered. South Wales Borderers 1st Battalion (Reg) 2nd Battalion (Reg) 3rd (Reserve) Battalion (SR) The Brecknockshire Battalion (TF) - formerly the 1st Volunteer Battalion Monmouthshire Regiment 1st (Rifle) Battalion, The Monmouthshire Regiment (TF) – formerly the 2nd Volunteer Battalion 2nd Battalion, The Monmouthshire Regiment (TF) - formerly the 3rd Volunteer Battalion 3rd Battalion, The Monmouthshire Regiment (TF) - formerly the 4th Volunteer Battalion World War I During World War I the British Army's regimental system was vastly increased. The TF formed 2nd Line and 3rd Line (Reserve) battalions, and the 'Kitchener's Army' recruits formed new Service battalions. During the war the South Wales Borderers had a total of 21 battalions, the Monmouths a further 10. All of the new battalions were either disbanded during the war or in its immediate aftermath: 1st Battalion – served with 1st Division on the Western Front 2nd Battalion – served in the Siege of Tsingtao, then joined 29th Division and served at Gallipoli and on the Western Front 3rd (Reserve) Battalion (SR) – remained in the UK 1/1st Brecknockshire Battalion (TF) – went to India with 44th (Home Counties) Division and served in Aden 2/1st Brecknockshire Battalion (TF) – formed in September 1914 at Brecon; joined the 68th (2nd Welsh) Division in 1915; absorbed by the 2/7th Royal Welsh Fusiliers in November 1916. 3/1st Brecknockshire Battalion (TF) – formed in April 1915 at Brecon; became 1st (Reserve) Battalion in April 1916; amalgamated with the 1st (Reserve) Battalion, Monmouthshires, in August 1917 4th (Service) Battalion – formed in August 1914 at Brecon; joined 13th (Western) Division and saw service at Gallipoli and in Mesopotamia 5th (Service, later Pioneer) Battalion – formed in September 1914 at Brecon; joined 19th (Western) Division and saw service on the Western Front 6th (Service, later Pioneer) Battalion – formed in September 1914 at Brecon; joined 25th Division, transferred to 30th Division, seeing service on the Western Front 7th (Service) Battalion) - formed in September 1914 at Brecon; joined 22nd Division and saw service at Salonika 8th (Service) Battalion – formed in September 1914 at Brecon; also joined