1st Ohio Infantry Regiment

1861

April 14 - April 29

Organized at large

April 17

Mustered in for three months service under Colonel Alexander M. McCook

April 19

Moved to Washington, D.C. and duty in the Defenses of that city

June

Attached to Schenck's Brigade, Tyler's Division, McDowell's Army of Northeast Virginia.

June 17 & July 9

Actions at Vienna, Va.

July 16-21

McDowell's advance on Manassas, Va.

July 17

Occupation of Fairfax Court House, Va.

July 21

Battle of Bull Run. Cover retreat to Washington.

August 2

Ordered to Ohio and mustered out, expiration of term.

The regiment was reorganized for three years service in the fall of 1861, serving in the western theater.