When tanks were first used in action in 1916, they were operated by the Heavy Branch of the Machine Gun Corps.
During this time, the unit saw heavy action; it fought at the Battle of Messines, Passchendaele, Cambrai, Amiens (using Whippet Mk A light tanks), Bapaume, 2nd Arras and Cambrai-St Quentin.
After the Armistice, the Tank Corps was severely cut down; from twenty-six battalions in 1919 to four by the early 1920s.
6 RTR saw action during the Suez crisis in 1956, where HQ, B and C Squadrons were landed to support Operation Musketeer.
In 1948, the Regiment was located at Scofton aerodrome (RAF Worksop),[2] in Nottinghamshire, training TA's from 45 Leeds Rifles.