The first official appearance was on October 19, 1789 when President George Washington came to Hartford. They have been in every parade, inauguration, and public event from 1789 to 1835. They escorted presidential visits to Connecticut, including Theodore Roosevelt. They also escorted Governor Chamberlin to the Louisiana Purchase Exposition in St. Louis in 1904.
The Troop has petitioned in 1911 to be reorganized into a troop of cavalry. Troop B, as they were then called, were attached to the Connecticut National Guard. In 1916, they served a tour of duty on the Mexican border in response to raids on American property. With US involvement in World World I becoming inevitable, Troop B was dismounted and reorganized as part of the 101st Machine Gun Battalion of the 26th Yankee Division. They saw combat in seven major battles in France.
Troop B regained its status as mounted cavalry after the war when they became part of the 122nd Cavalry Squadron. During the 1920s and '30's they sponsored polo matches, mounted drills, and other shows. In the late 1930s the modernization of the military threatened the Troop, but some veterans were able to revitalize it.
Troop B was federalized right before World War 2 and became 208th Coastal Artillery Anti-Aircraft, who defended America's coastlines. After Pearl Harbor, they were called to active duty and served in the South Pacific.
In 1946, the company was not Troop B anymore and returned as the 1st Company Governor's Horse Guard and found its home in Avon, Connecticut in 1954. Since then, the Guard has helped in times of state crises and its four units are still active today.