20th Cavalry
181st Pennsylvania Volunteers
Field and Staff Officers
Six Months Service

into Service |
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| John E. Wynkoop | Colonel | July 7, 1863 | Transferred to 181st, 3 years regiment P. V., January, 1864 |
| Wm. Rotch Wister | Lt Colonel | July 13, 1863 | Mustered out with regiment, Jannury 6, 1864 |
| Samuel W. Comly | Major | June 19, 1863 | Mustered out with regiment, Jannury 6, 1864 |
| J. Harry Thorp | Major | June 27, 1863 | Promoted from Captain company A, July 13, 1863; transferred to 181st, 3 years’ regiment P. V., January, 1864 |
| Robert B. Douglass | Major | July 17, 1863 | Promoted from Captain company G, August 20, 1863; transferred to 181st, 3 years’ regiment P. V., January, 1864 |
| Carroll S. Tyson | Adjutant | July 7, 1863 | Mustered out with regiment, January 6, 1864 |
| William J. Smith | Quarter Master | June 25,1863 | Promoted from 2d Lt. company C, July 7, 1863; mustered out with regiment, January 6, 1864 |
| Samuel Y. Curtis | Commissary Sergeant | October 3,1862 | Promoted from Q. M. Sergeant Co. A 160th reg. P. V., July 23,1863; transferred to 181st, 3 years’ regiment P. V., January, 1864 |
| Augustus G. Walls | Surgeon | September 8,1863 | Transferred to 181st, 3 years’ regiment P. V., January, 1864 |
| Charles H. Haesler | Assistant Surgeon | July 10, 1863 | Mustered out with regiment, January 6, 1664 |
| Robert C. Marshall | Assistant Surgeon | August 24,1863 | Mustered out with regiment, January 6, 1864 |
| J. M. Thomas | Sergeant Major | June 27,1863, | Promoted from private company A, August 31, 1863; mustered out with regimient, January 6, 1864 |
| Samuel G. Divine | Sergeant Major | June 25,1863, | Promoted from 1st Sgt. Co. C, August 8, 1863; to 2d Lieutenant company C, September 4, 1863 |
| Herman C. Pulte | Quarter Master Sergeant | June 2,1863, | Promoted from Corporal company C, July 7,1863; mustered out with regiment, January 6, 1864 |
| William Bair | Commissary Sergeant | June 21,1863, | Promoted from Sergeant company A, July 7,1863; mustered out with regiment, January 6, 1864 |
| Hugh B. Brisbin | Hospital Steward | July 7,1863, | Mustered out with regiment, January 6, 1864 |
| Isaac B. O’Conner | Hospital Steward | June 24,1863, | Promoted from Sergeant company I, November 1,1863; mustered out with regiment, January 6, 1864 |
| Samuel Gates | Saddler | June 23,1863, | Promoted from private company D, September 1, 1863; mustered out with regiment, January 6, 1864 |
| Alfred S. Sparks | Chief Bugler | June 2,1863, | Promoted from private company C, September 1, 1863; mustered out with regiment, January 6, 1864 |
| Peter Henseler | Veterinary Surgeon | June 25, 1863, | Promoted from Sergeant company H, November 1,1863; mustered out with regiment, January 6, 1864 |
Source: Bates, Samuel P. History of the Pennsylvania Volunteers, 1861-65, Harrisburg, 1868-1871.