1/1st

August 1914 : in Bridgend. Part of the South Wales Mounted Brigade. Moved to Hereford on mobilisation, then to Thetford where Brigade came under orders of 1st Mounted Division.
November 1915 : dismounted.
March 1916 : moved to Egypt and formed 4th Dismounted Brigade with the Welsh Border Mounted Brigade.
2 February 1917 : merged with 1/1st Pembroke Yeomanry to form the 24th (Pembroke & Glamorgan Yeomanry) Bn, the Welsh Regiment and came under orders of 231st Brigade in 74th (Yeomanry ) Division. Moved to France in May 1918.

2/1st

Formed in September 1914 as a Second-Line unit and came under command of 2/1st South Wales Mounted Brigade in January 1915.
September 1915 : Brigade came under orders of 1st Mounted Division.
Brigade redesignated 4th Mounted Brigade in April 1916.
November 1916 : merged with 2/1st Pembroke Yeomanry to form the 2nd (Pembroke & Glamorgan Yeomanry) Cyclist Bn, in 1st Cyclist Brigade.
March 1917 : resumed identity, still in same Brigade.

3/1st

Formed as a Third-Line training unit in 1915.
Remained in United Kingdom until disbanded in early 1917.

Men who served with the Yeomanry can be researched in exactly the same way as, for example, infantrymen.
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