| 2nd Sussex Rifle Volunteers 4th Bn, Royal Sussex Regiment 4th/5th (Cinque Ports) Bn, Royal Sussex Regiment | |
|---|---|
| Active | 2 December 1859–1 April 1967 |
| Country |  United Kingdom |
| Branch |  Volunteer Force/Territorial Force |
| Role | Infantry |
| Size | 1–3 Battalions |
| Part of | 53rd (Welsh) Division 34th Division 44th (Home Counties) Division 12th (Eastern) Division 10th Armoured Division |
| Garrison/HQ | Worthing Denne Road Drill Hall, Horsham |
| Engagements | |
| Commanders | |
| Notable commanders | Sir Walter Barttelot, 1st Baronet Sir Henry Fletcher, 4th Baronet Henry Fitzalan-Howard, 15th Duke of Norfolk Sir William Campion Sir Lashmer Whistler |
The 2nd Sussex Rifle Volunteers was a part-time unit of the British Army first raised from the county of Sussex in 1859. It later became the 4th Battalion, Royal Sussex Regiment. A detachment served in the Second Boer War. During the First World War, the battalion fought at Gallipoli, in Sinai and Palestine, and then in the final months of the war on the Western Front. In the Second World War, both the battalion and its duplicate served in the Battle of France and were evacuated from Dunkirk. The 4th Battalion then fought at the Second Battle of El Alamein, and served in the Middle East until the end of the war. It continued in the postwar Territorial Army until it lost its individual identity in a series of mergers from 1967.