First Battle of Bull Run order of battle: Union

The following units and commanders fought in the First Battle of Bull Run on the Union side. The Confederate order of battle is shown separately. Order of battle compiled from the army organization during the battle and the reports.

• BG = Brigadier General
• Col = Colonel
• Ltc = Lieutenant Colonel
• Maj = Major
• Cpt = Captain
• Lt = Lieutenant

• w = wounded
• mw = mortally wounded
• k = killed
• c = captured

BG Irvin McDowell, Commanding

General Staff:

• Chief of Artillery: Maj William F. Barry
• Chief Engineer: Maj John G. Barnard
• Chief Quartermaster: Cpt Otis H. Tillinghast (mw)

• Manassas National Battlefield Park - The Battle of First Manassas.
• The Manassas Campaign, Virginia, July 21, 1861.
• Robert Underwood Johnson, Clarence Clough Buell, Battles and Leaders of the Civil War: The Opening Battles, Volume 1 (Pdf), New York: The Century Co., 1887.
• Longacre, Edward G. (2014). The Early Morning of War: Bull Run, 1861. Norman: University of Oklahoma Press. ISBN 9780806147611.
• U.S. War Department, The War of the Rebellion: a Compilation of the Official Records of the Union and Confederate Armies, U.S. Government Printing Office, 1880–1901.