Start My Family Tree Welcome to Geni, home of the world's largest family tree.
Join Geni to explore your genealogy and family history in the World's Largest Family Tree.

The Union Armies (USA) of the US Civil War

« Back to Projects Dashboard

view all


  • Bvt. Brig. Gen. John Jacob Astor III (1822 - 1890)
    -------------------- John Jacob Astor III (June 10, 1822 – February 22, 1890) was the elder son of William Backhouse Astor, Sr. and the wealthiest member of the Astor family in his generat...
  • Major Madison M. Walden (USA) (1836 - 1891)
    Madison Miner Walden (October 6, 1836 - July 24, 1891) was a Civil War officer, teacher, publisher, farmer, the eighth Lieutenant Governor of Iowa, and a one-term Republican U.S. Representative from ...
  • Lt. Colonel Noah L. Farnham (USA) (1829 - 1861)
    Lt. Colonel Noah L. Farnham was mortally wounded while commanding the 11th New York Infantry at the First Battle of Bull Run. The New York Times, August 16, 1861: THE LATE COL. FARNHAM. In yest...
  • Brevet Maj. General David Hunter (USA) ("Black Dave") (1802 - 1886)
    David Hunter (July 21, 1802 – February 2, 1886) was a Union general in the American Civil War. He achieved fame by his unauthorized 1862 order (immediately rescinded) emancipating slaves in th...
  • Maj. General William B. Franklin (USA) (1823 - 1903)
    William Buel Franklin (February 27, 1823 – March 8, 1903) was a career United States Army officer and a Union Army general in the American Civil War. He rose to the rank of a corps commander i...

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