However, on 10 August TF units were invited to volunteer for Overseas Service, and the majority accepted.

The 1st Line battalions serving with the South Wales Brigade therefore received a distinguishing '1/' prefix.

After serving in Aden it returned to India in August 1915 and remained attached to 44th (Home Counties) Division for the remainder of the war.

[10][11][17][18] Also on 29 October, 1/6th Welsh left the brigade for Line of Communication duties on the Western Front.

[12][21] The rest of the brigade, now consisting of just two battalions, moved to Tunbridge Wells in November 1914 and to Scotland in February 1915 on the Tay and Forth Defences.