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The Union Armies (USA) of the US Civil War

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  • Samuel Calhoun (1846 - 1935)
    206th Regiment Pennsylvania Infantry, Company H Mustered in on August 31, 1864. Mustered out with Company on June 26, 1865.
  • Elijah Armstrong Henderson (1843 - 1929)
    Drafted to Company D, Pennsylvania 46th Infantry Regiment on 14 Jul 1863. Mustered out on 16 Jul 1865 at Alexandria, VA.
  • William O. McDonald (1841 - 1905)
    William served in the Civil War Co I, 82nd PA vol Inf He was prisoner of war from May 5, 1864- Dec 6, 1864 Enlisted as a Private on 18 November 1864. Drafted into Company I, 82nd Infantry Regiment Pe...
  • Rev. John Esch (1844 - 1930)
    Served in Battery L of the 6th Artillery / 212th PA Volunteer Unit. Mustered in on August 30, 1864. Mustered out with Battery on June 13, 1865. He entered the ministry shortly after his discharge f...
  • Sylvester Avery (1832 - 1863)
    Served in 8th Vt. reg't, Co. D; d. June 3, 1863, in the army. THE GROTON AVERY CLAN, Vol. I, by Elroy McKendree Avery and Catherine Hitchcock (Tilden) Avery, Cleveland, 1912. p. 542

The Union Army was the land force that fought for the Union during the American Civil War. It was also known as the Federal Army, the U.S. Army, the Northern Army and the National Army.[1] It consisted of the small United States Army (the regular army), augmented by massive numbers of units supplied by the Northern states, composed of volunteers as well as conscripts.

Major organizations

The Union Army was composed of numerous organizations, which were generally organized geographically.


   An organization that covered a defined region, including responsibilities for the Federal installations therein and for the field armies within their borders. Those named for states usually referred to Southern states that had been occupied. It was more common to name departments for rivers or regions.

District: A subdivision of a Department . There were also Subdistricts for smaller regions.

Military Division

   A collection of Departments reporting to one commander . Military Divisions were similar to the regions described by the more modern term, Theater.


   The fighting force that was usually, but not always, assigned to a District or Department but could operate over wider areas.


(such as Department of the Tennessee, Department of the Cumberland) (Department of the Pacific, Department of New England, Department of the East, Department of the West, Middle Department)

District== (e.g., District of Cairo, District of East Tennessee)


(e.g., Military Division of the Mississippi, Military Division of the Gulf)



Regular Army