History of the 3rd Maine Infantry
| Muster in: June 4, 1861 in Augusta, Maine |
| Muster out: June 28, 1864 Augusta, Maine |
| Militia units: |
| Company A - Bath City Grays |
| Engagements |
| First Bull Run, Virginia - July 21, 1861 |
| Bailey's Crossroads, Virginia - August, 28, 1861 |
| Yorktown, Virginia - April 5, through May 4, 1862 ( Peninsular Campaign ) |
| Williamsburg, Virginia - May 4. 1862 ( Peninsular Campaign ) |
| Seven Pines, Virginia - May 31, June 1, 1862 ( Peninsular Campaign ) |
| White Oak Swamp, Virginia - June 25, 1862 ( Peninsular Campaign ) |
| Malvern Hill, Virginia - July 1, 1862 ( Peninsular Campaign ) |
| Second Bull Run, Virginia - August 29,30, 1862 |
| Chantilly, Virginia - September 1, 1862 ( Second Bull Run Campaign ) |
| Fredricksburg, Virginia - December, 13, 1862 |
| Chancellorsville, Virginia - May 1,2,3,4 1863 |
| Gettysburg, Pennsylvania - July 1,2,3 1863 |
| Wapping Heights, Virginia - July 21,22,23, 1863 ( Bristoe Campaign ) |
| Catlett's Station, Virginia - October 14, 1863 ( Bristoe Campaign ) |
| Kelly's Ford, Virginia - November 7,1863 ( Bristoe Campaign ) |
| Orange Grove, Virginia - November 26, 1863 ( Bristoe Campaign ) |
| Mine Run, Virginia - November 30, 1863 |
| Wilderness, Virginia - May 5,6,7 1864 |
| Spottsylvania, Virginia - May 7 through May 20 1864 |
| North Anna, Virginia - May 23 through May 27, 1864 |
| Totopotomy, Virginia - May 26 through 30, 1864 |
| Cold Harbor, Virginia - May 31 through June 4, 1864 |
|
On June 4, 1864, 64 men transferred to the 17th Maine, the rest departed for Maine to be discharged. |