When the Guards Division was formed in August 1915, it included three machine gun companies, with a fourth added in March 1917.

[1] In April 1917, the four companies were grouped together as a single battalion named the Machine Gun Guards,[2] before being re-designated by Royal Warrant in May 1918 as the Guards Machine Gun Regiment.

In November 1918, after the end of the war, the three Household Cavalry battalions resumed their old role as cavalry, with the 4th Battalion disbanded in February 1919.

[1] The regimental establishment of HQ and four machine gun companies was retained until 1920, and the regiment took part in the Trooping the Colour ceremony in Hyde Park, London to mark the King's Official Birthday in June 1919 alongside the other regiments of foot guards.

[6] On 26 February 1920 an army order was issued announcing that the regiment was to be immediately disbanded and the 1918 royal warrant cancelled.