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| Date | Battle | Alternate Name | Location | Code | Victor | Casualties | |
| Charleston Harbor: April 1861 | |||||||
| 12-14 Apr 1861 | Fort Sumter I | Charleston, SC | SC001 | Confederate | 11 US | 4 CS | |
| The Blockade of Chesapeake Bay and the Potomac River: May - June 1861 | |||||||
| 18-19 May 1861 | Sewell's Point | Norfolk, VA | VA001 | draw | 10 Total | ||
| 29 May - 1 Jun 1861 | Aquia Creek | Stafford County, VA | VA002 | draw | None | ||
| 10 Jun 1861 | Big Bethel | Bethel Church, Great Bethel | Hampton, VA | VA003 | Confederate | 76 US | 8 CS |
| West Virginia: June - December 1861 | |||||||
| 3 Jun 1861 | Philippi | Barbour County, WV | WV001 | Union | 5 US | 6 CS | |
| 11 Jul 1861 | Rich Mountain | Randolph County, WV | WV003 | Union | 74 US | 88 CS | |
| 26 Aug 1861 | Kessler's Cross Lanes | Nicholas County, WV | WV004 | Confederate | 132 US | 40 CS | |
| 10 Sep 1861 | Carnifex Ferry | Nicholas County, WV | WV006 | Union | 158 US | 32 CS | |
| 12-15 Sep 1861 | Cheat Mountain | Pocahontas County, WV | WV005 | draw | 71 US | 100 CS | |
| 3 Oct 1861 | Greenbrier River | Camp Bartow | Pocahontas County, WV | WV007 | Confederate | 43 US | 52 CS |
| 13 Dec 1861 | Camp Allegheny | Allegheny Mountain | Pocahontas County, WV | WV008 | Confederate | 137 US | 146 CS |
| Missouri: June - October 1861 | |||||||
| 17 Jun 1861 | Boonville | Boonville, MO | MO001 | Union | 12 US | 12 CS | |
| 5 Jul 1861 | Carthage | Carthage, MO | MO002 | Confederate | 44 US | 74 CS | |
| 10 Aug 1861 | Wilson's Creek | Oak Hills | Greene and Christian Counties, MO | MO004 | Confederate | 1,317 US | 1,422 CS |
| 2 Sep 1861 | Dry Wood Creek | Battle of the Mules | Vernon County, MO | MO005 | Confederate | 14 US | ?? CS |
| 13-20 Sep 1861 | Lexington I | Battle of the Hemp Bales | Lexington, MO | MO006 | Confederate | 3,500 US | 100 CS |
| 17 Sep 1861 | Liberty | Blue Mills Landing | MO003 | Confederate | 56 US | 70 CS | |
| 21 Oct 1861 | Fredericktown | Fredericktown, MO | MO007 | Union | ?? US | 62 CS | |
| 25 Oct 1861 | Springfield I | Zangonyi's Charge | Springfield, MO | MO008 | Union | 85 US | 133 CS |
| Manassas Campaign: July 1861 | |||||||
| 2 Jul 1861 | Hoke's Run | Falling Waters | Hainesville, WV | WV002 | Confederate | 73 US | 25 CS |
| 18 Jul 1861 | Blackburn's Ford | Prince William and Fairfax Counties, VA | VA004 | Confederate | 83 US | 68 CS | |
| 21 Jul 1861 | 1st Manassas | 1st Bull Run | Prince William County, VA | VA005 | Confederate | 2,896 US | 1,982 CS |
| North Carolina: August 1861 | |||||||
| 28-29 Aug 1861 | Fort Clark and Fort Hatteras | Hatteras Inlet Forts | Dare County, NC | NC001 | Union | 3 US | 670 CS |
| Kentucky: September - December 1861 | |||||||
| 19 Sep 1861 | Barbourville | Barbourville, KY | KY001 | Confederate | 15 US | 5 CS | |
| 21 Oct 1861 | Camp Wildcat | Wildcat Mountain | Laurel County, KY | KY002 | Union | 43 US | 53 CS |
| 8-9 Nov 1861 | Ivy Mountain | Ivy Creek, Ivy Narrows | Floyd County, KY | KY003 | Union | 30 US | 263 CS |
| 17 Dec 1861 | Rowlett's Station | Woodsonville, Green River | Hart County, KY | KY004 | Union | 40 US | 91 CS |
| Blockade of the Potomac River: September 1861 - March 1862 | |||||||
| 3 Jan 1862 | Cockpit Point | Freestone Point, Shipping Point | Prince William County, VA | VA100 | draw | None | |
| Florida: October 1861 | |||||||
| 9 Oct 1861 | Santa Rosa Island | Escambia County, FL | FL001 | Union | 67 US | 87 CS | |
| Northern Virginia: October - December 1861 | |||||||
| 21 Oct 1861 | Ball's Bluff | Harrison's Landing | Leesburg, VA | VA006 | Confederate | 921 US | 149 CS |
| 20 Dec 1861 | Dranesville | Fairfax County, VA | VA007 | Union | 71 US | 230 CS | |
| Grant on the Mississippi River: November 1861 | |||||||
| 7 Nov 1861 | Belmont | Belmont, MO | MO009 | Union | 607 US | 641 CS | |
| Indian Territory: November - December 1861 | |||||||
| 19 Nov 1861 | Round Mountain | Unknown County | OK001 | Confederate | ?? US | 10 CS | |
| 9 Dec 1861 | Chusto-Talasah | Caving Banks | Tulsa County | OK002 | Confederate | 412 US | 52 CS |
| 26 Dec 1861 | Chustenahlah | Osage County | OK003 | Confederate | 211 US | 40 CS | |
| Missouri: December 1861 - January 1862 | |||||||
| 28 Dec 1861 | Mount Zion Church | Boone County, MO | MO010 | Union | 72 US | 210 CS | |
| 8 Jan 1862 | Roan's Tan Yard | Silver Creek | Randolph County, MO | MO011 | Union | 11 US | 80 CS |
| Kentucky: January 1862 | |||||||
| 10 Jan 1862 | Middle Creek | Floyd County, KY | KY005 | Union | 27 US | 65 CS | |
| 19 Jan 1862 | Mill Springs | Logan's Cross-Roads, Fishing Creek | Pulaski and Wayne Counties, KY | KY006 | Union | 262 US | 529 CS |
| Sibley's New Mexico Campaign: February - March 1862 | |||||||
| 20-21 Feb 1862 | Valverde | Valverde, NM | NM001 | Confederate | 263 US | 187 CS | |
| 26-28 Mar 1862 | Glorieta Pass | Santa Fe and San Miguel Counties, NM | NM002 | Union | 132 US | 227 CS | |
| Cumberland and Tennessee Rivers: February - June 1862 | |||||||
| 6 Feb 1862 | Fort Henry | Stewart County, TN | TN001 | Union | 47 US | 99 CS | |
| 12-16 Feb 1862 | Fort Donelson | Stewart County, TN | TN002 | Union | 2,832 US | 17,000 CS | |
| 6-7 Apr 1862 | Shiloh | Pittsburg Landing | Hardin County, TN | TN003 | Union | 13,047 US | 10,069 CS |
| 29 Apr - 30 May 1862 | Siege of Corinth | Corinth, MS | MS016 | Union | 1,000 US | 1,000 CS | |
| North Carolina: February - December 1862 | |||||||
| 7-8 Feb 1862 | Roanoke Island | Fort Huger | Dare County, NC | NC002 | Union | 264 US | 2,643 CS |
| 14 Mar 1862 | New Bern | New Bern, NC | NC003 | Union | 476 US | 609 CS | |
| 23 Mar - 26 Apr 1862 | Fort Macon | Carteret County, NC | NC004 | Union | 3 US | 439 CS | |
| 19 Apr 1862 | South Mills | Camden | Camden, NC | NC005 | Confederate | 114 US | 25 CS |
| 5 Jun 1862 | Tranter's Creek | Pitt County, NC | NC006 | Union | 40 Total | ||
| 14 Dec 1862 | Kinston | Kinston, NC | NC007 | Union | 160 US | 525 CS | |
| 16 Dec 1862 | White Hall | White Hall Ferry | Wayne County, NC | NC008 | draw | 150 Total | |
| 17 Dec 1862 | Goldsboro Bridge | Goldsboro, NC | NC009 | Union | 220 Total | ||
| Jackson Against the B & O Railroad: January 1862 | |||||||
| 5-6 Jan 1862 | Hancock | Hancock, MD | MD001 | draw | 25 Total | ||
| Middle Tennessee River: February - June 1862 | |||||||
| 28 Feb - 8 Apr 1862 | Island No. 10 | New Madrid | New Madrid, MO | MO012 | Union | 51 US | 7,000 CS |
| 6 Jun 1862 | Memphis I | Memphis, TN | TN004 | Union | 1 US | 180 CS | |
| Pea Ridge, Arkansas: March 1862 | |||||||
| 6-8 Mar 1862 | Pea Ridge | Elkhorn Tavern | Benton County, AR | AR001 | Union | 1,384 US | 2.000 CS |
| Jackson's Shenandoah Valley Campaign: March - June 1862 | |||||||
| 23 Mar 1862 | 1st Kernstown | Kernstown, VA | VA101 | Union | 590 US | 718 CS | |
| 8 May 1862 | McDowell | Sitlington's Hill | McDowell, VA | VA102 | Confederate | 256 US | 500 CS |
| 15-17 May 1862 | Princeton Court House | Actions at Wolf Creek | Princeton, WV | WV009 | Confederate | 129 US | 16 CS |
| 23 May 1862 | Front Royal | Guard Hill, Cedarville | Front Royal, VA | VA103 | Confederate | 904 US | 56 CS |
| 25 May 1862 | 1st Winchester | Bowers Hill | Winchester, VA | VA104 | Confederate | 2,019 US | 400 CS |
| 8 Jun 1862 | Cross Keys | Cross Keys, VA | VA105 | Confederate | 684 US | 288 CS | |
| 9 Jun 1862 | Port Republic | Port Republic, VA | VA106 | Confederate | 1,000 US | 800 CS | |
| Peninsula Campaign: March - August 1862 | |||||||
| 8-9 Mar 1862 | Hampton Roads | Battle of the Ironclads | Hampton Roads, VA | VA008 | Confederate | 409 US | 24 CS |
| 5 Apr - 4 May 1862 | Siege of Yorktown | Yorktown, VA | VA009 | draw | 182 US | 300 CS | |
| 5 May 1862 | Williamsburg | Fort Magruder | Williamsburg, VA | VA010 | draw | 2,283 US | 1,560 CS |
| 7 May 1862 | Eltham's Landing | Barhamsville, West Point | New Kent County, VA | VA011 | Confederate | 186 US | 48 CS |
| 15 May 1862 | Drewry's Bluff | Fort Darling, Fort Drewry | Chesterfield County, VA | VA012 | Confederate | 24 US | 15 CS |
| 27 May 1862 | Hanover Court House | Hanover, VA | VA013 | Union | 355 US | 746 CS | |
| 31 May - 1 Jun 1862 | Seven Pines | Fair Oaks Station | Henrico County, VA | VA014 | Union | 5,000 US | 6,100 CS |
| 25 Jun 1862 | Oak Grove | French's Field, King's School House | Henrico County, VA | VA015 | Confederate | 626 US | 441 CS |
| 26 Jun 1862 | Beaver Dam Creek | Mechanicsville, Ellerson's Mill | Mechanicsville, VA | VA016 | Union | 361 US | 1,484 CS |
| 27 Jun 1862 | Gaines' Mill | 1st Cold Harbor | Hanover County, VA | VA017 | Confederate | 6,837 US | 8,750 CS |
| 27-28 Jun 1862 | Garnett's and Golding's Farms | Henrico County, VA | VA018 | Union | 189 US | 438 CS | |
| 29 Jun 1862 | Savage's Station | Henrico County, VA | VA019 | draw | 919 US | 444 CS | |
| 30 Jun 1862 | Glendale | Henrico County, VA | VA020a | Union | 2,700 US | 3,600 CS | |
| 30 Jun 1862 | White Oak Swamp | Henrico County, VA | VA020b | ||||
| 1 Jul 1862 | Malvern Hill | Poindexter's Farm | Henrico County, VA | VA021 | Union | 3,000 US | 5,355 CS |
| Fort Pulaski: April 1862 | |||||||
| 10-11 Apr 1862 | Fort Pulaski | Chatham County, GA | GA001 | Union | 1 US | 1 CS | |
| New Orleans: April - May 1862 | |||||||
| 16-28 Apr 1862 | Fort Jackson and Fort St. Philip | Plaquemines Parish, LA | LA001 | Union | 229 US | 782 CS | |
| 25 Apr - 1 May 1862 | New Orleans | New Orleans, LA | LA002 | Union | None | ||
| Charleston: June 1862 | |||||||
| 16 Jun 1862 | Secessionville | Grimball's Landing, James Island | Charleston and James Island, SC | SC002 | Confederate | 683 US | 204 CS |
| 21 Jun 1862 | Simmon's Bluff | Charleston County, SC | SC003 | Union | None | ||
| Arkansas: June - July 1862 | |||||||
| 17 Jun 1862 | St. Charles | St. Charles, AR | AR002 | Union | 160 US | 40 CS | |
| 7 Jul 1862 | Hill's Plantation | Cache River, Cotton Plant, Round Hill | Woodruff County, AR | AR003 | Union | 63 US | 250 CS |
| Confederate Heartland Offensive: June - October 1862 | |||||||
| 7-8 Jun 1862 | Chattanooga I | Chattanooga, TN | TN005 | draw | ?? US | 3 CS | |
| 13 Jul 1862 | Murfreesboro I | Murfreesboro, TN | TN006 | Confederate | 1,200 US | 150 CS | |
| 29-30 Aug 1862 | Richmond | Richmond, KY | KY007 | Confederate | 5,623 US | 600 CS | |
| 14-17 Sep 1862 | Munfordville | Green River Bridge | Munfordville, KY | KY008 | Confederate | 4,148 US | 285 CS |
| 8 Oct 1862 | Perryville | Perryville, KY | KY009 | Union | 4,211 US | 3,396 CS | |
| Northern Virginia Campaign: August - September 1862 | |||||||
| 9 Aug 1862 | Cedar Mountain | Slaughter's Mountain, Cedar Run | Culpeper County, VA | VA022 | Confederate | 2,500 US | 525 CS |
| 22-25 Aug 1862 | Rappahannock River | Waterloo Bridge, White Sulphur Springs | Culpeper and Fauquier Counties, VA | VA023 | Confederate | 225 Total | |
| 26-27 Aug 1862 | Manassas Station/Junction | Kettle Run | Prince William County, VA | VA024 | Confederate | Unknown | |
| 28 Aug 1862 | Thoroughfare Gap | Chapman's Mill | VA025 | Confederate | 100 Total | ||
| 28-30 Aug 1862 | 2nd Manassas | 2nd Bull Run | Prince William County, VA | VA026 | Confederate | 13,826 US | 525 CS |
| 1 Sep 1862 | Chantilly | Ox Hill | Chantilly, VA | VA027 | Confederate | 1,300 US | 525 CS |
| Maryland Campaign: September 1862 | |||||||
| 12-15 Sep 1862 | Harpers Ferry | Harpers Ferry, WV | WV010 | Confederate | 12,719 US | 286 CS | |
| 14 Sep 1862 | South Mountain | Crampton Gap, Turner Gap, Fox Gap | Washington and Frederick Counties, MD | MD002 | Union | 2,325 US | 2,300 CS |
| 17 Sep 1862 | Antietam | Sharpsburg, MD | MD003 | draw | 12,400 US | 10,300 CS | |
| 19-20 Sep 1862 | Shepherdstown | Boteler's Ford | Shepherdstown, WV | WV016 | Confederate | 363 US | 291 CS |
| Iuka and Corinth, Mississippi Campaign: September - October 1862 | |||||||
| 19 Sep 1862 | Iuka | Iuka, MS | MS001 | Confederate | 790 US | 594 CS | |
| 3-4 Oct 1862 | Corinth | Corinth, MS | MS002 | Union | 2,350 US | 4,800 CS | |
| 6 Oct 1862 | Davis Bridge | Hatchie's Bridge, Matamora | Hardeman and McNairy Counties, TN | TN007 | Union | 500 US | 400 CS |