1/1st
August 1914 : in Wrexham. Part of the Welsh Border Mounted Brigade, which in September 1914 was attached to the 1st Mounted Division.
November 1915 : became a dismounted unit
March 1916 : moved to Egypt, and formed 4th Dismounted Brigade, with the South Wales Mounted Brigade.
February 1917 : formed the 24th (Denbighshire Yeomanry) Bn, Royal Welsh Fusiliers, attached to 231st Brigade, 74th Division
2/1st
Formed September 1914, and remained in UK throughout the war. In July 1916, converted into a Cyclist unit.
3/1st
Formed in 1915. Remained in United Kingdom until disbanded in early 1917.