I Brigade, Royal Horse Artillery
| A Brigade, RHA I Brigade, RHA |
|
|---|---|
| Active | 1 July 1859 – 1 July 1889 1 March 1901 – October 1914 March 1919 – 11 May 1938 |
| Country |
 United Kingdom
|
| Branch |
 British Army
|
| Type | Artillery |
| Size | Battalion |
I Brigade, Royal Horse Artillery was a brigade of the Royal Horse Artillery which existed in the early part of the 20th century. It was dissolved at the outbreak of World War I as its constituent batteries were posted to other formations.
Post-war, the brigade was reformed, serving in the UK, Egypt and India before being redesignated as 1st Regiment, RHA in May 1938 at Aldershot.
The brigade had an earlier incarnation as A Brigade, RHA, formed from the Horse Brigade, Royal Artillery in 1864 before being broken up in 1889.
Royal Horse Artillery brigades did not exist as an organizational or operational grouping of batteries until 1 July 1859 when the Horse Brigade, Royal Artillery was formed. It commanded all the existing horse artillery batteries of the Royal Artillery:
As a result of the Indian Rebellion of 1857, the British Crown took direct control of India from the East India Company on 1 November 1858 under the provisions of the Government of India Act 1858. The Presidency armies transferred to the direct authority of the British Crown and its European units were transferred to the British Army. Henceforth artillery, the mutineers most effective arm, was to be the sole preserve of the British Army (with the exception of certain Mountain Artillery batteries). On 19 February 1862, the Bengal, Bombay and Madras Horse Artilleries transferred to the Royal Artillery as its 2nd to 5th Horse Brigades.
The 1st Brigade with 10 batteries was much larger than the other four (with four to seven batteries each). A reorganization of the Horse Artillery on 13 April 1864 saw 1st Brigade split as A Horse Brigade, Royal Artillery and B Brigade, 2nd Brigade become C Brigade, 3rd become D Brigade, 4th become E Brigade, and 5th become F Brigade. As battery designations were tied to the brigade the battery was assigned to, the batteries were also redesignated. A Horse Brigade, RA comprised:
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