III Brigade, Royal Horse Artillery was a brigade of the Royal Horse Artillery which existed in the early part of the 20th century. It served with the 1st and 2nd Cavalry Divisions on the Western Front throughout World War I. Post-war, the brigade served in the UK and India before being redesignated as 3rd Regiment, RHA in August 1938 in Egypt. The regiment had an earlier incarnation as C Brigade, RHA, formed from the 1st Brigade of the Honourable East India Company's Bengal Horse Artillery in 1862 before being broken up in 1882.
