These units were formed as part of the raising of the First New Army, K1. They are also sometimes shown as 62, 63, 64 and 65 (Howitzer) Brigades RFA.
LXII
- This brigade was originally comprised of numbers 196, 197 and 198 Batteries RFA and the Brigade Ammunition Column. It was placed under command of the 12th (Eastern) Division.
- In February 1915 the three six-gun batteries were reorganised to become four four-gun batteries and were titled as A, B, C and D.
- On 25 May 1916 D Battery left to join 65 Brigade which was also under command of 12th (Eastern) Division, and was replaced by A (Howitzer) Battery from 65 Brigade RFA. It was then renamed as the new D (Howitzer) Battery.
- The brigade was reorganised on 30 August 1916. C Battery was broken up and a two-gun section from itwas added to each of A and B Batteries. C Battery and half of A Battery joined from 65 Brigade RFA and were made into a new C Battery.
- On 7 January 1917 a section of two guns joined from C (Howitzer) Batery of 64 Brigade RFA and was added to D (Howitzer) Battery.
- The brigade remained with 12th (Eastern) Division throughout the war: you can see details of its battles and movements on the page describing the division.
LXIII
- This brigade was originally comprised of numbers 199, 200 and 201 Batteries RFA and the Brigade Ammunition Column. It was placed under command of the 12th (Eastern) Division.
- In February 1915 the three six-gun batteries were reorganised to become four four-gun batteries and were titled as A, B, C and D.
- On 25 May 1916 D Battery left to join 65 Brigade which was also under command of 12th (Eastern) Division, and was replaced by B (Howitzer) Battery from 65 Brigade RFA. It was then renamed as the new D (Howitzer) Battery.
- The brigade was reorganised on 30 August 1916. Half of each of A and B Batteries of 65 Brigade and were added to bring A, B and C batteries up to six guns each. D Battery of 63 Brigade was exchanged with D Battery from 65 Brigade. Brigade HQ also arrived from 65 Brigade and took over command of 63 Brigade.
- On 7 January 1917 a section of two guns joined from C (Howitzer) Batery of 64 Brigade RFA and was added to D (Howitzer) Battery.
- The brigade remained with 12th (Eastern) Division throughout the war: you can see details of its battles and movements on the page describing the division.
LXIV
- This brigade was originally comprised of numbers 202, 203 and 204 Batteries RFA and the Brigade Ammunition Column. It was placed under command of the 12th (Eastern) Division.
- In February 1915 the three six-gun batteries were reorganised to become four four-gun batteries and were titled as A, B, C and D.
- On 25 May 1916 D Battery left to join 65 Brigade which was also under command of 12th (Eastern) Division.
- The brigade was reorganised on 30 August 1916. C Battery was broken up, with a section going to each of A and B Batteries to bring them up to six guns each.
- On 11 October 1916 D (Howitzer) Battery joined from 63 Brigade RFA and became D (Howitzer) Battery of this brigade.
- A new C (Howitzer) Battery joined on 7 December 1916.
- The brigade left 12th (Eastern) Division and became an Army Brigade on 6 January 1917.
- C (Howitzer) Battery left at this time. It was broken up and two-gun sections went to D (Howitzer) Batteries of 62 and 63 Brigades to bring them up to six guns each.
- B Battery of 158 Brigade RFA (in 35th Division) joined and became the new C Battery.
- A section of two guns from D (Howitzer) Battery of 158 Brigade also joined and brought D (Howitzer) battery up to six guns.
LXV (Howitzer)
- This brigade was originally comprised of numbers 205, 206 and 207 (Howitzer) Batteries RFA and the Brigade Ammunition Column. It was placed under command of the 12th (Eastern) Division.
- In February 1915 the three six-gun batteries were reorganised to become four four-gun batteries and were titled as A, B, C and D.
- On 18 June 1915 C Battery left. It joined 129 Brigade (27th Division) on 6 September 1915.
- The brigade was reorganised on 25 May 1916. A an B Batteries left to join 62 and 63 Brigades respectively. The D Batteries of 62, 63 and 64 Brigades joined and became A, B and C Batteries of this brigade.
- The brigade was broken up on 30 August 1916 and then ceased to exist. HQ went to 63 Brigade; one section of A Battery went to 63 Brigade; B Battery joined 63 Brigade but was split to bring other batteries of that brigade up to six guns each; the other section of A Battery joined C Battery, which then joined 62 Brigade; D Battery moved to 63 Brigade.
Note: a new 65 Army Field Artillery Brigade was formed in England and landed in France on 3 May 1917. It is a different unit to that described above.