In 1911 the First Company Governor’s Horse Guards became Troop B Cavalry, Connecticut National Guard. Troop B soon began construction of a privately funded armory (with stables and drill shed) at 836 Farmington Avenue in West Hartford. The plans were provided by architects and troop members A. Raymond Ellis and Francis E. Waterman, who made the building very functional without extra features in order to keep costs down. Built in 1912-1913, the armory was soon officially acquired by the state. The unit served along the Mexican border in 1916 and in World War I as a Machine Gun Battalion. By the late 1930s mechanization was bringing an end to horse cavalry in the US Army. In 1940 the unit became part of the 208th Coastal Artillery Regiment and the Armory was converted to store large vehicles. After the War, the First Company Governor’s Horse Guards was reorganized as a state militia unit and today has a facility in Avon. The Army continued to house various units in the West Hartford Armory until the early 1980s, when the building was decommissioned and sold by the state. It was then extensively altered for use as professional office suites.