The regiment is part of NATO's Very High Readiness Joint Task Force (Land).

During the Battle of Sidi Rezegh in the Western Desert on 23 November 1941, Brigadier John Charles Campbell, who only a few months earlier had been commanding 4th RHA, won the Victoria Cross.

[4] After World War Two, in 1947, 4th Regiment RHA was based in Germany at Dorset Barracks in Kiel.

In 1977, the regiment relieved 7th RHA in Aldershot in support of 6 Field Force and equipped with the 105mm Light Gun adopted the parachute role.

In 1982, two gun batteries and the regimental HQ (RHQ), with mortar locating radar and intelligence sections, deployed to retake the Falkland Islands.

[5] In 1984, the regiment moved to Osnabrück and was equipped with the M109 155mm Self-propelled gun, remaining in support of the 1st Armoured Division and in 1986, 88 (Arracan) Battery deployed to Long Kesh (HMP Maze) in Northern Ireland.