Of the 18 engagements Confederates won 8, Union won 6 and 4 were inconclusive.
| Date | Engagement | Military Units | Losses | Victor |
|---|---|---|---|---|
| April 12-14 | Fort Sumter, SC | Confederate artillery, Union garrison | None | CSA |
| April 15 | Evacuation of Fort Sumter, SC | Union garrison | Two Union soldiers killed, four wounded by accidental explosion | N.A. |
| April 19 | Baltimore Riots, MD | MA 6th, PA 26th vs secessionist crowd | 4 Union soldiers killed, 12 civilians killed, hundreds wounded | USA |
| May 10 | St. Louis Riots, MO | Union forces vs secessionist crowd | 4 Union soldiers killed, 3 prisoners, 28 civilians killed | USA |
| May 18-19 | Sewell's Point, VA | Union naval squadron vs Confederate shore artillery | 10 total | inconclusive |
| May 29- June 1 | Aquila Creek, VA | Union naval squadron vs Confederate shore artillery | 10 total | inconclusive |
| June 1 | Fairfax Court House, VA | detachments from CSA & USA armies | 8 on each side, 1 each killed | inconclusive |
| June 3 | Philippi, WVA | Union Dept of Ohio (McClellan), CSA infantry | Union 4, CSA 26 (killed or wounded) | USA |
| June 10 | Big Bethel, VA | Union: 3,500 (Butler) , CSA 1,400 (Magruder) | Union 18-killed 53-wounded, CSA: 1-K 9-W | CSA |
| June 15 | Hooe's Ferry (near Mathias Point) VA | Union schooner Christina Keen; CSA Farmer's Fork Grays | none -- Christina Keen captured and burned | CSA |
| June 17 | Vienna, VA | Detachments from both Union & CSA armies | Union: 8 killed, 4 wounded; CSA: none reported | CSA |
| June 17 | Boonville, MO | Union Western Dept (Lyon) 1,700 vs. MO State Guard (Marmaduke) ~1,500 | Union: 5-killed, 7-wounded, MO Guard 5-k 17-w | USA |
| June 18 | Camp Cole, MO | Union Home Guards (~500), Confederate State Guards (~350) | Union: 35 killed, 60 wounded 25 captured CSA: 7-K, 25-W | CSA |
| June 27 | Matthias' Point, VA | Union gunboats ~50 vs. Confed garrison ~500 | Union: 1-killed, 4-wounded; CSA none | CSA |
| July 2 | Hoke's Run, WVA | Union Army of the Shenandoah- 8,000 (2 brigades. Confederate Army of the Shenandoah - 4,000 (1 brigade) | Union: 3-killed, 70-total; CSA 9-killed, 23-total | USA |
| July 5 | Carthage, MO | Union Department of the West -- 1,000. Confederate Missouri State Guard -- 4,000 | Union: 44-total; CSA 200-total | CSA |
| July 5 | Neosho, MO | Union 3rd Missouri, Confederate cavalry. | Union: 137-total; CSA zero total | CSA |
| July 8 | Laurel Hill, WVA | Union Dept of Ohio. Confederate Army of the Northwest | Union: 8-total; CSA unknown | USA |