The Mountain Batteries of the Royal Garrison Artillery

The Regular and New Army Batteries

Mountain Battery	Allocations
No 1 Battery	In India. 2nd (Rawalpindi) Division Jan 1916 to Oct 1918. 4th (Quetta) Division Jan 1919.
No 2 Battery	In France with III Corps Dec 1914; transferred to 4th Divisional Troops Mar 1915; transferred to Indian Army Aug 1915; transferred to Army Troops Salonika Mar 1916; transferred to 3rd Mountain Artillery Division* June 1916 to 11 May 1918. At Jutogh Mar 1919.
No 3 Battery	In India. 4th (Quetta) Division Jan 1916; to 2nd (Rawalpindi) Division Jan 1919.
No 4 Battery	In India. 4th (Quetta) Division Jan 1916; to 2nd (Rawalpindi) Division Jan 1919.
No 5 Battery	In France with II Corps Dec 1914; transferred to 3rd Divisional Troops Mar 1915; transferred to Indian Army Aug 1915; transferred to Army Troops Salonika Mar 1916; transferred to 3rd Mountain Artillery Division* June 1916 to 11 May 1918. At Jutogh Mar 1919.
No 6 Battery	In India. 1st (Peshawar) Division Jan 1916; to 2nd (Rawalpindi) Division May 1916; returned to 1st (Peshawar) Division Feb 1917.
No 7 Battery	In France with IV Corps Dec 1914; transferred to I Corps Jan 1915; transferred to IV Corps Aug 1915; transferred to Army Troops Salonika Mar 1916; transferred to 3rd Mountain Artillery Division* June 1916 to 11 May 1918. At Jutogh Mar 1919.
No 8 Battery	In India. 1st (Peshawar) Division Jan 1916.
No 9 Battery	In India. 2nd (Rawalpindi) Division Jan 1916. 4th (Quetta) Division Jan 1919.
No 10 Battery	a battery of 3.7 inch howitzers, joined VIII Mountain Bde RGA at Catterick on 11 July 1917. Began a move to Egypt, going from Southampton on 23 August 1917 and concentrated as a Bde at Sidi Bishr. Transferred to IX Mounted Bde 26 January 1918
No 11 Battery	a battery of 3.7 inch howitzers, joined VIII Mountain Bde RGA at Catterick on 11 July 1917. Began a move to Egypt, going from Southampton on 23 August 1917 and concentrated as a Bde at Sidi Bishr. Placed under orders of 75th Division between 25 March and 15 September 1918
No 12 Battery	a battery of 3.7 inch howitzers, joined VIII Mountain Bde RGA at Catterick on 11 July 1917. Began a move to Egypt, going from Southampton on 23 August 1917 and concentrated as a Bde at Sidi Bishr. Transferred to IX Mounted Bde 26 January 1918
No 13 Battery	a battery of 3.7 inch howitzers, joined VIII Mountain Bde RGA at Catterick on 11 July 1917. Began a move to Egypt, going from Southampton on 23 August 1917 and concentrated as a Bde at Sidi Bishr. Placed under orders of 75th Division between 25 March and 15 September 1918
No 16 Battery	a battery of 2.75 inch guns and formerly B/IX Brigade, joined IX Mounted Bde in Egypt 26 January 1918
No 17 Battery	a battery of 2.75 inch guns and formerly A/IX Brigade, joined VIII Mounted Bde in Egypt 26 January 1918.. Placed under orders of 75th Division between 25 March and 15 September 1918

* source gives "Division" but I believe it should really be "Brigade".

The Territorial Batteries

Mountain Battery	Allocations
Argyll Battery	4th Highland Brigade. Army Troops with Egyptian Expeditionary Force Mar to Sept 1916; 4th Mountain Artillery Brigade Salonika Jan 1917 to 11 May 1918.
Ross & Cromarty Battery	4th Highland Brigade. Army Troops with Egyptian Expeditionary Force Mar to Sept 1916; 4th Mountain Artillery Brigade Salonika Jan 1917 to 11 May 1918.
1/1st Bute Battery	4th Highland Brigade. Army Troops Salonika Sept 1916; 4th Mountain Artillery Division* Nov 1916 to 11 May 1918. Detailed history
3rd Mountain Artillery Brigade	Army Troops Salonika Nov 1916 to June 1917.
4th Highland Mountain Artillery Brigade	Army Troops Salonika Nov 1916 to June 1917.
Base Details 3rd Mountain Artillery Brigade	Salonika Lines of Communication Jan 1917.

Sources: Allocation of Mountain Batteries RGA. National Archives WO95/5494; ORBAT 75th Division, A. F. Becke.