21st Pennsylvania Infantry Regiment in the American Civil War

1861
April 20	Organized at Philadelphia and mustered in for three months service under Colonel John F. Ballier, Lieutenant Colonel Charles Ernenwein, Major Adolph Mehler and Adjutant George Wynkoop. The men were all from Philadelphia, and almost all were German. Company A – Captain Arthur Shields Company B – Captain Alvin Matzdorf Company C – Captain John Aitmeier Company D – Captain Nicholas Brandon Company E – Captain Bernhard Gessler Company F – Captain George Adolph Muhlek Company G – Captain John W. Beamish Company H – Captain Augustus Ledig Company i – Captain Louis Voltaire Company K – Captain John Benedict Kohler
May 21	Marched to Suffolk Park and continued an iintensive schedule of drill and instruction.
May 28	Moved to Chambersburg and attached to George H. Thomas’ Brigade, 1st Division, Patterson’s Army
June 6	March to Greencastle
June 15	Crossed the Potomac River and advanceed on the Martinsburg Road
June 16-24	Returned to Maryland. At Williamsport.
June 25	At Downsville
July 2	Falling Waters
July 3	Occupation of Martinsburg
July 15	Advance on Bunker Hill
July 17	Marched to Charlestown, then to Harper’s Ferry
August	Moved by rail to Baltimore to Philadelphia
August 9	The 21st Pennsylvania Infantry Regiment mustered out. Colonel Ballier was authorized to recruit another regiment for three years service, which became the 98th Pennsylvania Infantry Regiment. Many men of the 21st reenlisted in the 98th.