Maine - Union
Cavalry
| 1st Regiment Cavalry | 2nd Regiment Cavalry |
Artillery
| 1st Regiment Heavy Artillery | 1st Battery Light Artillery "A" | 2nd Battery Light Artillery "B" |
| 3rd Battery Light Artillery "C" | 4th Battery Light Artillery "D" | 5th Battery Light Artillery "E" |
| 6th Battery Light Artillery "F" | 7th Battery Light Artillery "G" | Garrison Artillery |
Infantry
| Maine Company Sharpshooters | 1st Battalion Sharpshooters | 1st Regiment Infantry |
| 1st Regiment Veteran Infantry | 1st Battalion Infantry | 2nd Regiment Infantry |
| 3rd Regiment Infantry | 4th Regiment Infantry | 5th Regiment Infantry |
| 6th Regiment Infantry | 7th Regiment Infantry | 8th Regiment Infantry |
| 9th Regiment Infantry | 10th Regiment Infantry | 11th Regiment Infantry |
| 12th Regiment Infantry | 13th Regiment Infantry | 14th Regiment Infantry |
| 15th Regiment Infantry | 16th Regiment Infantry | 17th Regiment Infantry |
| 18th Regiment Infantry | 19th Regiment Infantry | 20th Regiment Infantry |
| 21st Regiment Infantry | 22nd Regiment Infantry | 23rd Regiment Infantry |
| 24th Regiment Infantry | 25th Regiment Infantry | 26th Regiment Infantry |
| 27th Regiment Infantry | 28th Regiment Infantry | 29th Regiment Infantry |
| 30th Regiment Infantry | 31st Regiment Infantry | 32nd Regiment Infantry |
| Coast Guard Infantry, Company A | Coast Guard Infantry, Company B | Coast Guard Infantry, Company C |
| Coast Guard Infantry, Company D | Coast Guard Infantry, Company E | Coast Guard Infantry, Company F |
| Coast Guard Infantry, Company G |