1/1st Derbyshire Yeomanry. Territorial Force. 04 Aug 1914 at:
Headquarters - Derby
A Squadron - Chesterfield
B Squadron - Bakewell
C Squadron - Derby
D Squadron - Derby
in the Nottinghamshire and Derbyshire Mounted Brigade.

2/1st Derbyshire Yeomanry. Territorial Force. Formed Sep 1914. Joined 2/1st Nottinghamshire and Derbyshire Mounted Brigade.

3/1st Derbyshire Yeomanry. Territorial Force. Formed 1915. Joined a Reserve Cavalry Regiment.

The DY in Egypt, December 1916.

Signal Sergeant C R Allcock

1st Derby Yeomanry