4th Tyneside Irish
They were formed in January 1915, and joined 103rd Brigade, 34th Division in June 1915.
The Brigade landed in France in January 1916 and was initially in action at the Somme on 1st July 1916.
In August 1917, the battalion amalgamated with 24th Bttn to form 24/27th Bttn before the joint battalion disbanded during February 1918.
They were formed in January 1915, and joined 103rd Brigade, 34th Division in June 1915.
The Brigade landed in France in January 1916 and was initially in action at the Somme on 1st July 1916.
In August 1917, the battalion amalgamated with 24th Bttn to form 24/27th Bttn before the joint battalion disbanded during February 1918.