New York 21st Infantry (Union)
Muster
- Muster In Date:08 May 1861
- Muster In Place:
- Buffalo, New York
- Muster Out Date:18 May 1863
Other
- Aliases:
- 1st Buffalo, New York
- Leaders:
- Brigadier General Abner Doubleday
- Brigadier General Marsena R. Patrick
- Colonel William B. Tibbits
- Colonel William F. Rogers
- Major Charles G. Otis
- Major General Julius Stahel
Battles
Name | Start Date | End Date | Duration | Place |
|---|---|---|---|---|
| Antietam | 17 Sep 1862 | 17 Sep 1862 | < 1 day | Sharpsburg, Maryland |
| Fredericksburg | 13 Dec 1862 | 13 Dec 1862 | < 1 day | Fredericksburg, Virginia |
| Second Bull Run | 28 Aug 1862 | 30 Aug 1862 | 2 day(s) | Prince William County, Virginia |
| South Mountain | 14 Sep 1862 | 14 Sep 1862 | < 1 day | Frederick County, Maryland; Washington County, Maryland; Boonsboro, Maryland |