From 1658 to 1788, the Horse Guards existed as independent troops. They were placed on the English establishment in 1661, with the founding of the modern Regular British Army. In 1788, as part of the re-organization of the British Army, the remaining 1st and 2nd Troops were united with the 1st and 2nd Troops of Horse Grenadier Guards to form, respectively, the 1st and 2nd Regiments of Life Guards.