| Date | Service |
|---|---|
| 09/07/1861 | Enlisted on as a Corporal. |
| 09/07/1861 | Mustered into "A" Co. CT 10th Infantry |
| 09/08/1862 | Discharged for promotion |
| 09/08/1862 | Commissioned into "I" Co. CT 20th Infantry |
| 09/08/1862 | Promoted Captain |
| 05/03/1863 | Wounded Chancellorsville, VA |
| 07/20/1864 | Wounded Peach Tree Creek, GA |
| 03/23/1865 | Promoted Major (Not Mustered) |
| 06/13/1865 | Mustered out at Fort Lincoln, Washington, DC |
- Official Records - Report of May 5th, 1863"Capt. Ezra D. Dickerman was also wounded, in the intrenchments, and was supported off the field in the early part of the engagement."
- Cpl. Horatio D. Chapman, 20th Connecticut Infantry, Co. C (p.76 1864/7/21)"Capt. Dickerman of Company I-mortally wounded with a ball through the head..."