Second Brigade, Third Division

Colonel D A Woodbury, commanding the 4th Michigan Infantry

Fourth Michigan Infantry

COLONEL D A WOODBURY
LIEUTENANT COLONEL W W DUFFIELD
MAJOR J W CHILDS

Company A Smith Guard: CAPT. C LUCE
Company B Adrian Volunteers: CAPT. J H COLE
Company C Peninsular Guard: CAPT. A R WOOD
Company D Barry Guard: CAPT. J M RANDOLF
Company E Hillsdale Volunteers: CAPT. G W LUMBARD
Company F Hudson Volunteers: CAPT. S DEGOLYER
Company G Tecumseh Volunteers: CAPT. D D MARSHALL
Company H Grosvenor Guard: CAPT. M A FUNKE
Company I Trenton Volunteers: CAPT. D A GRANGER
Company K Dexter Union Guard: CAPT. A D CRANE

Sources

"We lay at Fairfax Station until 4 pm next day, when by orders of Col. Heintzelman, we left 4 companies, under Major Childs, 4th Michigan, to guard the depot, & marched the command via old Braddock (Road) to Centreville. Just as we turned off on the old Braddock Road, an order came from Gen. McDowell (by Maj. Wood) to detach the rest of (the) 4th Michigan to Fairfax C H."

Forgotten valor: the memoirs, journals, & Civil War letters of Orlando B Willcox, by Orlando B Willcox

Record of service of Michigan volunteers in the civil war, 1861–1865, Volume 4, by George H Turner

Michigan in the war, compiled by J Robertson, Adjutant General

The Union army: a history of military affairs in the loyal states 1861–65, records of the regiments in the Union army, cyclopedia of battles, memoirs of commanders and soldiers, Volume 3, New Jersey, Indiana, Illinois and Michigan

Notes

The 4th Michigan Infantry was mustered into service for three years on 20 June, 1861, at Adrian and mustered out at Detroit on 30 June, 1864. The 280 men and 3 officers, whose terms had not expired, were left with the 1st Michigan Infantry. The regiment was reorganised during the summer, eight companies being recruited, under the command of Colonel J W Hall and mustered in at Adrian, on 14 October, 1864. The regiment was mustered out at Houston, Texas, on 26 May, 1866.

Four companies of the 4th Michigan Infantry, under the command of Major J W Childs, were detached to guard the depot at Fairfax Station and the remaining companies were detached to Fairfax Courthouse and not engaged in the battle proper on 21 July, 1861.

The Military District of the Potomac was established on 25 July, 1861 by consolidating the Military District of Washington and the Department of Northeastern Virginia and redesignated the Department of the Potomac on 15 August, 1861. The 4th Michigan Infantry was assigned to Brigadier General W T Sherman's brigade, Army of the Potomac, in August 1861.

Orders of Battle