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Defenders of the Capital

The 3rd Massachusetts Heavy Artillery Regiment

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Unit Overview

Establishment and Purpose

The 3rd Massachusetts Volunteer Heavy Artillery Regiment was a distinguished unit within the Union Army during the American Civil War. Initially formed from existing unattached companies raised for the defense of the Massachusetts coast, its primary mission evolved to garrison the critical military forts protecting the nation's capital, Washington D.C. The regiment was officially constituted in the fall of 1864, serving actively from January 1863 until its final muster out on September 26, 1865.

Leadership and Strength

Under the notable command of Colonel William S. Abert, the regiment comprised a substantial force. Its full complement included 94 officers and 1803 enlisted men, totaling 1897 individuals. This significant manpower underscored its importance in maintaining the extensive defensive network around Washington.

Historical Trajectory

Formation and Deployment

Between January 1863 and early 1864, twelve distinct companies of heavy artillery were raised in Massachusetts. These units, initially designated as "unattached," were tasked with garrisoning the state's coastal fortifications. In the spring of 1864, a significant portion of these companies, including the 3rd through 12th, received orders to deploy to Washington D.C. Their objective was to reinforce and man the vital forts safeguarding the Union capital.

Company I: A Specialized Role

Company I, originally the 13th Unattached Company, possessed a unique composition. Recruited largely from skilled mechanics employed at Springfield, Massachusetts' National Armory, these soldiers brought valuable engineering expertise. Consequently, they were detached from the main regiment and assigned to the Army of the James. During the arduous Siege of Petersburg, Company I played a critical role in constructing and maintaining vital infrastructure, notably holding the pontoon bridge across the James River. This specialized service meant they were the last elements of the regiment to be mustered out, concluding their service on September 26, 1865.

The Unattached Companies

Constituent Companies

The 3rd Massachusetts Heavy Artillery Regiment was formed by consolidating several independent companies. These "unattached" companies were raised at different times and served as the foundational elements of the regiment. The table below details these companies, their designation numbers, and their respective muster dates into service.

Company Unatt. # Muster Date
A 3rd 10 January 1863
B 6th 19 May 1863
C 7th 14 August 1863
D 8th 14 August 1863
E 9th 27 August 1863
F 10th 16 September 1863
G 11th 20 October 1863
H 12th 20 November 1863
I 13th 10 February 1864
K 14th 12 May 1864
L 15th 30 May 1864
M 16th August 1864

It is noteworthy that other unattached heavy artillery companies raised in Massachusetts (the 1st, 2nd, 4th, and 5th) were organized into the 1st Battalion Massachusetts Volunteer Heavy Artillery in 1863.

Personnel and Casualties

Regiment Strength

The 3rd Massachusetts Heavy Artillery Regiment was a substantial military formation. At its full strength, it comprised 94 commissioned officers and 1803 enlisted men, bringing the total effective strength to 1897 soldiers. This significant number reflects the critical role assigned to heavy artillery units in static defensive positions during the Civil War.

Service-Related Losses

The regiment experienced losses primarily due to the harsh conditions and prevalent diseases of the era, rather than direct combat engagement. Records indicate that two officers and thirty-nine enlisted men succumbed to illness or accidental causes during their service. Crucially, no members of the 3rd Massachusetts Heavy Artillery were reported killed in action, underscoring their function as garrison troops responsible for the defense of fixed positions.

Operational Structure

Command and Brigade Assignments

By April 1865, the regiment was integrated into the Union's Army of the Potomac, then under the command of Major General George Meade. The 3rd Massachusetts Heavy Artillery was strategically divided between the Second and Third Brigades, both falling under the command of Brigadier General Martin Davis Hardin's division. This structure facilitated the coordinated manning of the extensive defensive works.

Second Brigade (Colonel William S. Abert):

  • Company A - Captain Benjamin A. Ball
  • Company D - Lieutenant Lewis R. Whittaker
  • Company G - Captain Thomas Herbert
  • Company H - Captain George W. Pierce
  • Company K - Captain Edwin Thomas
  • Company L - Captain Joseph M. Parsons
  • Company M - Captain Cornelius F. Driscoll

Third Brigade (Major George S. Worcester):

  • Company B - Lieutenant James E. Childs
  • Company C - Captain Alfred W. Brigham
  • Company E - Captain Leonard Gordon
  • Company F - Captain Joseph Austin

Fortifications of Washington D.C.

The regiment's primary responsibility was the manning of the formidable network of fortifications designed to protect Washington D.C. These defenses were crucial for maintaining Union morale and operational capacity. The soldiers of the 3rd Massachusetts Heavy Artillery were stationed across numerous forts and batteries, forming a critical line of defense.

The troops were assigned to various positions, including:

  • Fort Baker
  • Fort Bayard
  • Fort Bunker Hill
  • Fort Carrell
  • Fort Davis
  • Fort De Russy
  • Fort Du Pont
  • Fort Gaines
  • Fort Greble
  • Fort Kearny
  • Fort Lincoln
  • Fort Mahan
  • Fort Mansfield
  • Fort Meigs
  • Fort Reno
  • Fort Ricketts
  • Fort Saratoga
  • Fort Simmons
  • Fort Slemmer
  • Fort Slocum
  • Fort Snyder
  • Fort Stanton
  • Fort Stevens
  • Fort Sumner
  • Fort Thayer
  • Fort Totten
  • Fort Wagner

Additionally, they manned several batteries, such as:

  • Battery Cameron
  • Battery Kemble
  • Battery Parrott
  • Battery Vermont

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References

References

  1.  As a regiment, it wasn't organized until the fall of 1864, but the first of the unattached companies it would later include was mustered on 10 Jan 1863
A full list of references for this article are available at the 3rd Massachusetts Heavy Artillery Regiment Wikipedia page

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Important Notice

This page has been generated by an Artificial Intelligence and is intended solely for informational and educational purposes. The content is derived from a snapshot of publicly available data, primarily from Wikipedia, and may not represent the most current or exhaustive information available.

This is not professional historical or military advice. The information provided herein should not be considered a substitute for consultation with qualified historians, military analysts, or archival professionals. Always consult primary sources and expert analysis for definitive historical understanding.

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