1/1st

August 1914 : in Derby. Part of the Notts & Derby Mounted Brigade, which in August 1914 was attached to the 1st Mounted Division.

September 1914 : the Brigade moved to the 2nd Mounted Division

April 1915 : moved to Egypt

August 1915 : dismounted, moved to Gallipoli. Returned to Egypt in December 1915, and formed part of Western Frontier Force.

February 1916 : Brigade left Division and moved to Salonika, redesignated 7th Mounted Brigade. D Squadron joined 27th Division between March and June 1916. Regiment remained in Macedonia when Brigade returned to Egypt, as GHQ Troops.

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 absorbed into 4th Reserve Cavalry Regiment in early 1917.