The 6th Vermont Infantry Regiment was a three years' infantry regiment in the Union Army during the American Civil War. Organized at Montpelier and mustered in October 15, it served in the Army of the Potomac (AoP). It departed Vermont for Washington, DC, October 19, 1861. It served in the Eastern Theater, predominantly in the VI Corps, AoP, from October 1861 to June 1865. It was a part of the Vermont Brigade.
The 5th Maine Infantry Regiment was an infantry regiment of the Union Army during the American Civil War.
The 9th Regiment Massachusetts Volunteer Infantry was a military unit from Boston, Massachusetts, USA, part of the Army of the Potomac during the American Civil War. It is also known as "The Fighting Ninth". It existed from 1861 to 1864 and participated in several key battles during the war. The unit is an Irish heritage unit, with many volunteers having been born in Ireland.
The 7th Maine Infantry Regiment was an infantry regiment that served in the Union Army during the American Civil War. It participated in most of the campaigns and battles of the Army of the Potomac in the Eastern Theater.
The 1st Maryland Infantry Regiment, Potomac Home Brigade was an infantry regiment that served in the Union Army during the American Civil War.
The 2nd Regiment Massachusetts Volunteer Infantry was an infantry regiment in the Union Army during the American Civil War. Major George H. Gordon, a West Point graduate and veteran of the Mexican–American War, organized the unit's recruitment and formation. The 2nd Massachusetts was trained at Camp Andrew in West Roxbury, Massachusetts on the site of the former Transcendentalist utopian community, Brook Farm. Roughly half the regiment was mustered in on May 18, 1861 and the remainder on May 25, 1861 for a term of three years. The regiment saw extensive combat as part of the Army of the Potomac particularly during the Battle of Antietam and the Battle of Gettysburg.
The 29th Regiment Massachusetts Volunteer Infantry was an infantry regiment in the Union army of the United States during the American Civil War. The regiment was organized in December 1861 when three new companies were attached to a battalion of seven Massachusetts companies that had been in active service since May 1861. These seven companies had been recruited to fill out the 3rd Massachusetts and 4th Massachusetts regiments and had signed on for three years of service. When the 3rd and 4th Massachusetts were mustered out in July 1861, the seven companies that had signed on for three years were grouped together to form a battalion known as the Massachusetts Battalion. Finally, in December 1861, three more companies were added to their roster to form a full regiment and the unit was designated the 29th Massachusetts.
The 1st Regiment Massachusetts Volunteer Infantry was an infantry regiment in the Union army during the American Civil War. It was the first regiment to leave Massachusetts for a three-year term in response to President Abraham Lincoln's May 3, 1861, call for three-year regiments. It was also the first three-year regiment from any state to reach Washington, D.C., for federal service. The core of the regiment was five companies from the 1st Massachusetts Volunteer Militia, a peace-time unit which was formed in 1858, replacing an earlier, disbanded unit of the same designation. Five companies of new recruits were added to the regiment and the unit was mustered in by companies beginning May 23, 1861, at Camp Cameron in Cambridge, Massachusetts.
The 4th Maryland Volunteer Infantry Regiment was an infantry regiment that served in the Union Army during the American Civil War.
Battery A, 1st Pennsylvania Light Artillery was a light artillery battery that served in the Union Army as part of the Pennsylvania Reserves infantry division during the American Civil War.
Battery D, 1st Pennsylvania Light Artillery was a light artillery battery that served in the Union Army as part of the Pennsylvania Reserves infantry division during the American Civil War.
The 3rd Massachusetts Battery, was an artillery battery that served in the Union Army during the American Civil War.
The Battery A, Maryland Light Artillery, was an artillery battery that served in the Union Army during the American Civil War. It briefly served as infantry from July 3, 1864 until March 11, 1865.
The 5th Regiment Massachusetts Volunteer Militia was a peacetime infantry regiment that was activated for federal service in the Union army for three separate tours during the American Civil War. In the years immediately preceding the war and during its first term of service, the regiment consisted primarily of companies from Essex County as well as Boston and Charlestown.
Independent Battery D, Pennsylvania Light Artillery, was an artillery battery that served in the Union Army during the American Civil War. The unit organized on 21 September 1861 and served until 13 June 1865. The battery participated in the battles of Second Bull Run, Chantilly, South Mountain, Antietam, and Fredericksburg in 1862. The following year, Battery D transferred to the Western theater where it took part in the Siege of Vicksburg and other operations. The years 1864–65 saw the unit fight at the first Petersburg assault, the Crater, Ream's Station, Battle of Peebles's Farm, Fort Stedman, and the final Petersburg assault. Battery D took part in the Grand Review of the Armies before being mustered out.
The 56th Regiment Massachusetts Volunteer Infantry was a regiment of infantry that served in the Union Army during the American Civil War. It was one of the four "Veteran Regiments" raised in the winter of 1863–64. Recruits of these regiments were required to have served at least nine months in a prior unit. The regiment was attached to the IX Corps of the Army of the Potomac and took part in Lieutenant General Ulysses S. Grant's Overland Campaign in the spring of 1864. They were in extremely heavy combat during the campaign, suffering great casualties during engagements which included the Battle of the Wilderness, Spotsylvania Courthouse, and the Battle of the Crater. They were involved in several assaults during the Siege of Petersburg in 1864 and participated in the spring 1865 battles which finally drove General Robert E. Lee's Confederate Army from their entrenchments in Petersburg, leading to the end of the war at Appomattox Courthouse.
The 2nd Massachusetts Battery was an artillery battery that served in the Union army during the American Civil War. The unit was initially known as "Cobb's Light Artillery" for its first commander, Major Moses Cobb. An experienced officer of the Massachusetts militia, Cobb was selected to organize and command the battery on April 20, 1861, however he did not go with the unit when it departed for the field. The unit was later known as "Nim's Battery" after its subsequent commanding officer, Capt. Ormand F. Nims. It was one of the Massachusetts regiments organized in response to President Abraham Lincoln's call on May 2, 1861, for volunteer troops to serve a term of three-years. The 2nd Massachusetts Battery was the first unit of artillery to be recruited in Massachusetts for three-years service. The battery trained at Camp Adams in Quincy, Massachusetts, and was mustered into federal service on July 31, 1861.
The 5th Massachusetts Battery was an artillery battery that served in the Union army during the American Civil War. It was one of the Massachusetts regiments organized in response to President Abraham Lincoln's call on May 2, 1861 for volunteer troops to serve a term of three-years. The battery trained at Camp Shouler in Lynnfield, Massachusetts and Camp Massasoit in Readville, Massachusetts. It departed Boston by steamship on December 25, 1861.
The 7th Massachusetts Battery was an artillery battery that served in the Union Army during the American Civil War. The original core of the unit was a company of infantry known as the Richardson Light Guard. The company initially served provost duty at Fortress Monroe, was eventually trained in light artillery drill, and reorganized on March 17, 1862 as the 7th Massachusetts Battery.
The 11th Massachusetts Battery was an artillery battery that served in the Union Army during the American Civil War. It was formed in response to President Abraham Lincoln's August 1862 call for 300,000 men to serve for nine months. Several months after completing their first term of service, the battery was reorganized for a second term of three years. It was recruited by Captain Edward J. Jones of Boston and consisted almost entirely of men from that city. The battery served a largely uneventful first term as garrison troops mostly in Centreville, Virginia. During their second term they were involved in heavy combat being part of the Army of the Potomac during Lieutenant General Ulysses S. Grant's Overland Campaign.
United States 
