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The Union Armies (USA) of the US Civil War

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  • John C. Fremont, "The Pathfinder" (1813 - 1890)
    John Charles Frémont (January 21, 1813 – July 13, 1890), was an American military officer, explorer, the first candidate of the Republican Party for the office of president of the U.S.,...
  • Sgt. Charles Montgomery King (1841 - 1920)
    Served in Company M of the 14th Pennsylvania Cavalry. Mustered in on November 23, 1862.
  • Pvt. Adam Tobias (1841 - 1862)
    Served in Company I of the 128th PA Regiment. Mustered in on August 15, 1862. Died in the Battle of Antietam on September 17, 1862.
  • Charles J. Dougherty (c.1843 - d.)
    Served in the Civil War (Penna) from 1/1/1862-12/31/1864. I was a "segar" maker before enrollment.
  • Andrew Parr Grubaugh (deceased)
    Andrew Grubaugh served during the Civil War with Ohio Co. 163rd Infantry, Co. C, enlisted 2 May 1864, discharged 10 Sep 1864.

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