Essex Royal Horse Artillery

The Essex Royal Horse Artillery was a Territorial Force Royal Horse Artillery battery that was formed in Essex in 1908. It saw active service during World War I in Egypt and Palestine from 1916 to 1918, initially as field artillery with 52nd (Lowland) Division before being converted back to horse artillery and serving with the 2nd Mounted / 5th Cavalry Division. A second line battery, 2/1st Essex RHA, served on the Western Front in 1917 and 1918 as part of an Army Field Artillery Brigade.

Formation
The Territorial Force (TF) was formed on 1 April 1908 following the enactment of the Territorial and Reserve Forces Act 1907 (7 Edw.7, c.9) which combined and re-organised the old Volunteer Force, the Honourable Artillery Company and the Yeomanry. On formation, the TF contained 14 infantry divisions and 14 mounted yeomanry brigades. Each yeomanry brigade included a horse artillery battery and an ammunition column.

On 18 March 1908, Essex Royal Horse Artillery (Territorial Force) was proposed as a new unit and it was recognized by the Army Council on 7 July 1908. The unit consisted of
 * Battery HQ at Market Road, Chelmsford
 * Essex Battery
 * No. 1 Section at Colchester
 * No. 2 Section at Chelmsford
 * Eastern Mounted Brigade Ammunition Column
 * A Sub-Section at Colchester
 * B Sub-Section at Chelmsford

Apparently, the Essex Yeomanry provided a number of members for the newly raised unit. The battery was equipped with four Ehrhardt 15-pounder guns and allocated as artillery support to the Eastern Mounted Brigade.

World War I
In accordance with the Territorial and Reserve Forces Act 1907 (7 Edw.7, c.9) which brought the Territorial Force into being, the TF was intended to be a home defence force for service during wartime and members could not be compelled to serve outside the country. However, on the outbreak of war on 4 August 1914, many members volunteered for Imperial Service. Therefore, TF units were split into 1st Line (liable for overseas service) and 2nd Line (home service for those unable or unwilling to serve overseas) units. 2nd Line units performed the home defence role, although in fact most of these were also posted abroad in due course.

1/1st Essex
The 1st Line battery was embodied with the Eastern Mounted Brigade on 4 August 1914 at the outbreak of the First World War. The brigade concentrated in the Ipswich area of Suffolk and joined the 1st Mounted Division on formation on 5 August. In late August it moved to Woodbridge. In September 1915, the Eastern Mounted Brigade (without the battery) was dismounted and left Suffolk for Liverpool en route to Gallipoli. The brigade was replaced in the 1st Mounted Division by 2/1st South Wales Mounted Brigade and the battery was assigned to it. The battery remained with 2/1st South Wales Mounted Brigade in East Anglia until January 1916.

Field artillery
The battery, along with the Hampshire and West Riding RHA, joined V Lowland Brigade, Royal Field Artillery (T.F.) when it was formed on 13 January 1916 at Leicester. Before departing for the Middle East, the battery were re-equipped with four 18 pounders.

The brigade embarked between 15 and 18 February 1916 at Devonport and arrived at Port Said on 2 March. It joined 52nd (Lowland) Division at El Qantara on 17 March in the Suez Canal Defences. The brigade was renumbered as CCLXIII Brigade, RFA (T.F.) on 28 May and the battery as B/CCLXIII Battery on the same date. On 15 September, the brigade was renumbered as CCLXIV Brigade, RFA (T.F.) (the battery became B/CCLXIV Battery) and on 30 December back to CCLXIII Brigade, RFA (T.F.). The battery was, once again, designated as B/CCLXIII Battery.

On that date, C Battery (formerly West Riding RHA) was broken up and one section joined the battery to make it up to six 18 pounders; the other section joined A Battery (former Hampshire RHA). The brigade now consisted of two batteries of six 18 pounders each.

While with 52nd (Lowland) Division, the division took part in the Battle of Romani (4 and 5 August 1916) and the First (26 and 27 March 1917) and Second (17–19 April 1917) Battles of Gaza.

Horse artillery
At the end of June 1917, arrangements were made to reform the brigade as a horse artillery brigade. On 5 July 1917, the brigade exchanged its 18 pounders for 13 pounders and was redesignated as XX Brigade, RHA (T.F.). Hampshire Battery RHA was reformed with four 13 pounders; presumably, Essex Battery RHA was similarly equipped. West Riding Battery RHA was not reformed at this point.

XX Brigade, RHA (with the Hampshire Battery) joined the Yeomanry Mounted Division at Khan Yunis on 5 July. However, Essex Batttery, RHA remained with 52nd (Lowland) Division until 17 September 1917 when it joined 7th Mounted Brigade which had returned to Egypt from Salonika on 29 June. The brigade served variously as Corps Troops with the Desert Mounted Corps and XXI Corps and on attachment to the Yeomanry Mounted Division. The battery was still assigned to 7th Mounted Brigade when it joined 2nd Mounted Division on 24 April 1918. At this point, the battery became divisional troops.

Essex RHA remained with 2nd Mounted Division (and 5th Cavalry Division when it was renamed on 22 July 1918) throughout the rest of the Sinai and Palestine Campaign. As part of the Desert Mounted Corps, it took part in the Affair of Abu Tellul (14 July) and the Final Offensive including the Battle of Megiddo (19 to 25 September), the Capture of Damascus (1 October), and the Occupation of Aleppo (26 October).

The division remained in Palestine on occupation duties after the end of the war. However, demobilization began immediately and most of the British war time units had left by the middle of 1919. The battery was reduced to cadre in Egypt on 8 October 1919.

2/1st Essex
Essex RHA formed a 2nd line, 2/1st Essex Battery, RHA, in March 1915.

The pre-war Territorial Force infantry divisions were generally supported by four field artillery brigades. These were numbered I, II, III and IV within each division and consisted of three gun brigades (each of three batteries, equipped with four 15-pounder guns) and a howitzer brigade (two batteries of four 5" howitzers). Artillery for 2nd Line divisions were formed in a similar manner, with a fractional designation, for example the 2/II North Midland Brigade, RFA (with 2/1st, 2/2nd and 2/3rd Staffordshire Batteries, RFA) for 59th (2nd North Midland) Division.  Territorial Force artillery brigades were later numbered in a consecutive sequence, and batteries lettered, so for the above example, CCXCVI Brigade, RFA with A, B and C batteries.

The battery, equipped with four 18 pounders, joined CCXCVI Brigade, RFA in 59th (2nd North Midland) Division in Ireland in early May 1916 and became D/CCXCVI Battery. On 10 July 1916, the battery transferred to CCXCVIII Brigade, RFA (former 2/IV North Midland Brigade) as B/CCXCVIII Battery. At this point, CCXCVIII Brigade consisted of three 2nd Line RHA batteries: 2/1st Hampshire as A Battery, 2/1st Essex as B Battery and 2/1st Glamorganshire as C Battery.

In January 1917, the division returned to England. Before leaving Ireland, the battery was made up to six 18 pounders with one section of C/CCXCVIII Battery (former 2/1st Glamorganshire Battery, RHA).

0n 2 February 1917, the division started moving overseas and by 3 March had completed its concentration in France. Shortly after arrival on the Western Front, on 4 April 1917, CCXCVIII Brigade left 59th (2nd North Midlnd) Division and became an Army Field Artillery Brigade. At the Armistice, the battery (six 18 pounders) was still with CCXCVIII Army Brigade, RFA serving as Army Troops with the Fourth Army.

Post war
The battery was reduced to cadre in Egypt on 8 October 1919. It was not reconstituted in the Territorial Force in 1920. However, in 1925, 339th Battery of 85th (East Anglian) Field Brigade, RA at Colchester was redesignated 339th (Essex RHA) Battery. In 1938, 104th (Essex Yeomanry) Regiment, Royal Horse Artillery incorporated 339th Battery.