The 1st Massachusetts Volunteer Heavy Artillery Regiment was a unit that served in the Union Army during the American Civil War.
They were mustered in on 5 July 1861, and left the state on 7 August for Washington, DC, where it would serve in its defenses until the end of the year.
During the Union retreat from the battlefield, Confederate cavalry overtook the 1st Massachusetts, capturing the surgical staff, the wagoners, and others.
[2] On 17 May 1864, many heavy artillery regiments filled in as infantry units and joined the Army of the Potomac as part of Grant's 1864 campaign.
Following Lee's surrender in April 1865, the 1st Massachusetts Heavy Artillery returned to Washington, DC and stationed the forts until they were mustered out in August.