When the Territorial Force was reconstituted as the Territorial Army in 1920, all seven Territorial battalions of the regiment were reconstituted. At the beginning of 1921, the regiment was formally retitled The Royal Scots (The Royal Regiment), and comprised two regular battalions, one Supplementary Reserve battalion, and four battalions of the newly renamed Territorial Army, all four of which were activated during the 1921 coal strike. In January 1922, reductions in the military led to the amalgamation of the Territorial component into two battalions. The three battalions not retained in 1921 were converted to support units outside the regimental structure. The 4th/5th Battalion was later, in 1938, transferred to the Royal Engineers and converted into an anti-aircraft role, becoming the 4th/5th Battalion, The Royal Scots (The Royal Regiment) (52nd Searchlight Regiment). It was later transferred to the Royal Artillery in August 1940 as the 52nd (Queen's Edinburgh, Royal Scots) Searchlight Regiment, Royal Artillery.