Iowa - Union
Cavalry
| 1st Regiment Cavalry | 2nd Regiment Cavalry | 3rd Regiment Cavalry |
| 4th Regiment Cavalry | 5th Regiment Cavalry | 6th Regiment Cavalry |
| 7th Regiment Cavalry | 8th Regiment Cavalry | 9th Regiment Cavalry |
Artillery
| 1st Independent Battery Light Artillery | 2nd Independent Battery Light Artillery |
| 3rd Independent Battery Light Artillery | 4th Independent Battery Light Artillery |
Infantry
| 1st Regiment Infantry | 1st Regiment Infantry (African Descent) | 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 |
| 33rd Regiment Infantry | 34th Regiment Infantry | 35th Regiment Infantry |
| 36th Regiment Infantry | 37th Regiment Infantry | 38th Regiment Infantry |
| 39th Regiment Infantry | 40th Regiment Infantry | 41st Regiment Infantry |
| 42nd Regiment Infantry | 43rd Regiment Infantry | 44th Regiment Infantry |
| 45th Regiment Infantry | 46th Regiment Infantry | 47th Regiment Infantry |
| 48th Regiment Infantry | 49th Regiment Infantry | 50th Regiment Infantry |