United States Regiments & Batteries > District of Columbia

February 26 Organized at Washington, D.C. under the command of Colonel Isaac A. Peck and Lieutenant Colonel Charles M. Alexander
March Attached to Military District of Washington, D.C. for duty in the Defenses of Washington and Alexandria
June 7 Colonel Peck resigned
June 12 Lieutenant Colonel Alexander was promoted to colonel
September 6-22

Maryland Campaign

Attached temporarily to 2nd Brigade, 1st Division, 5th Army Corps, Army of the Potomac.

September 16-17
Battle of Antietam

The regiment was in reserve and not engaged.

September 19 Sharpsburg, Shepherdstown Ford and near Williamsport
September 20 Near Shepherdstown
October Returned to duty in the Defenses of Washington and Alexandria
December Colonel Alexander took command of Tyler’s Division
March Assigned to 1st Brigade, Tyler’s Division, 22nd Army Corps, which was commanded by Colonel Alexander
May Assigned to District of Alexandria, 22nd Army Corps
February 16 Colonel Alexander mustered out. Colonel William Graham took command of the regiment
September 12 Mustered out