amalgamated to form 3rd/6th Dragoon Guards (1922); redesignated 3rd Carabiniers (Prince of Wales's Dragoon Guards) (1928); amalgamated with Royal Scots Greys (2nd Dragoons) to form Royal Scots Dragoon Guards (Carabiniers and Greys) (1971) 4th (Royal Irish) Dragoon Guards (1788, from 1st Irish Horse); redesignated 4th Royal Irish Dragoon Guards (1921); amalgamated to form 4th/7th Dragoon Guards (1922); redesignated 4th/7th Royal Dragoon Guards (1936); amalgamated to form Royal Dragoon Guards (1992) 5th Dragoon Guards (1788, from 2nd Irish Horse); redesignated 5th (Princess Charlotte of Wales's) Dragoon Guards (1804); redesignated 5th Dragoon Guards (Princess Charlotte of Wales's) (1920); amalgamated with The Inniskillings (6th Dragoons) to form 5th/6th Dragoons (1922); redesignated 5th Inniskilling Dragoon Guards (1927); redesignated 5th Royal Inniskilling Dragoon Guards (1935); amalgamated to form Royal Dragoon Guards (1992) 6th Dragoon Guards (The Carabiniers) (1788, from 3rd Irish Horse); redesignated The Carabiniers (6th Dragoon Guards) (1920); amalgamated to form 3rd/6th Dragoon Guards (1922) 7th (The Princess Royal's) Dragoon Guards (1788, from 4th Irish Horse); redesignated 7th Dragoon Guards (Princess Royal's) (1921); amalgamated to form 4th/7th Dragoon Guards (1922) The Dragoon Guards regiments were converted to armoured cars and tanks during the 1930s. There are still three Dragoon Guards regiments in the British Army: 1st The Queen's Dragoon Guards Royal Scots Dragoon Guards Royal Dragoon Guards Canadian Dragoon Guards Regiments The Princess Louise Dragoon Guards (5th Princess Louise Dragoon Guards from 1903 - 1920); amalgamated with the 4th Hussars of Canada in 1936 to form the 4th Princess Louise Dragoon Guards. Currently inactive / in suspended animation on the Supplementary Order of Battle. References External links History of 4th Dragoon Guards - includes reference to reason for conversion from Horse. Dragoon Guards Dragoons