- 100th Regiment Ohio Volunteer Infantry
- 101st Regiment Ohio Volunteer Infantry
- 102nd Regiment Ohio Volunteer Infantry
- 103rd Regiment Ohio Volunteer Infantry
- 104th Regiment Ohio Volunteer Infantry
- 105th Regiment Ohio Volunteer Infantry
- 106th Battalion Ohio Volunteer Infantry
- 106th Regiment Ohio Volunteer Infantry
- 107th Regiment Ohio Volunteer Infantry
- 108th Regiment Ohio Volunteer Infantry
- 109th Regiment Ohio Volunteer Infantry
- 10th Ohio Independent Battery of Ohio Volunteer Artillery
- 10th Regiment Ohio Volunteer Infantry (Three Months Service)
- 110th Regiment Ohio Volunteer Infantry
- 111th Regiment Ohio Volunteer Infantry
- 112th Regiment Ohio Volunteer Infantry
- 113th Regiment Ohio Volunteer Infantry
- 114th Regiment Ohio Volunteer Infantry
- 115th Ohio Volunteer Infantry
- 116th Regiment Ohio Volunteer Infantry
- 117th Regiment Ohio Volunteer Infantry
- 118th Ohio Volunteer Infantry
- 119th Regiment Ohio Volunteer Infantry
- 11th Regiment Ohio Volunteer Infantry (Three Months Service)
- 11th Ohio Independent Battery of Ohio Volunteer Artillery
- 11th Regiment Ohio Volunteer Militia
- 120th Regiment Ohio Volunteer Infantry
- 121st Regiment Ohio Volunteer Infantry
- 122nd Regiment Ohio Volunteer Infantry
- 123rd Regiment Ohio Volunteer Infantry
- 124th Regiment Ohio Volunteer Infantry
- 125th Regiment Ohio Volunteer Infantry
- 126th Regiment Ohio Volunteer Infantry
- 127th Regiment Ohio Volunteer Infantry
- 128th Regiment Ohio Volunteer Infantry
- 129th Regiment Ohio Volunteer Infantry
- 12th Ohio Independent Battery of Ohio Volunteer Artillery
- 12th Regiment Ohio Volunteer Cavalry
- 130th Regiment Ohio Volunteer Infantry
- 131st Regiment Ohio Volunteer Infantry
- 132nd Regiment Ohio Volunteer Infantry
- 133rd Regiment Ohio Volunteer Infantry
- 134th Regiment Ohio Volunteer Infantry
- 135th Regiment Ohio Volunteer Infantry
- 136th Regiment Ohio Volunteer Infantry
- 137th Regiment Ohio Volunteer Infantry
- 138th Regiment Ohio Volunteer Infantry
- 139th Regiment Ohio Volunteer Infantry
- 13th Ohio Independent Battery of Ohio Volunteer Artillery
- 13th Regiment Ohio Volunteer Cavalry
- 13th Regiment Ohio Volunteer Infantry (Three Months Service)
- 140th Regiment Ohio Volunteer Infantry
- 141st Regiment Ohio Volunteer Infantry
- 142nd Regiment Ohio Volunteer Infantry
- 143rd Regiment Ohio Volunteer Infantry
- 144th Regiment Ohio Volunteer Infantry
- 145th Regiment Ohio Volunteer Infantry
- 146th Regiment Ohio Volunteer Infantry
- 147th Regiment Ohio Volunteer Infantry
- 148th Regiment Ohio Volunteer Infantry
- 149th Regiment Ohio Volunteer Infantry
- 14th Ohio Independent Battery of Ohio Volunteer Artillery
- 14th Regiment Ohio Volunteer Infantry (Three Months Service)
- 150th Regiment Ohio Volunteer Infantry
- 151st Regiment Ohio Volunteer Infantry
- 152nd Regiment Ohio Volunteer Infantry
- 153rd Regiment Ohio Volunteer Infantry
- 154th Regiment Ohio Volunteer Infantry
- 155th Regiment Ohio Volunteer Infantry
- 156th Regiment Ohio Volunteer Infantry
- 157th Regiment Ohio Volunteer Infantry
- 158th Regiment Ohio Volunteer Infantry
- 159th Regiment Ohio Volunteer Infantry
- 15th Ohio Independent Battery of Ohio Volunteer Artillery
- 15th Regiment Ohio Volunteer Infantry (Three Months Service)
- 160th Regiment Ohio Volunteer Infantry
- 161st Regiment Ohio Volunteer Infantry
- 162nd Regiment Ohio Volunteer Infantry
- 163rd Regiment Ohio Volunteer Infantry
- 164th Regiment Ohio Volunteer Infantry
- 165th Regiment Ohio Volunteer Infantry
- 166th Regiment Ohio Volunteer Infantry
- 167th Regiment Ohio Volunteer Infantry
- 168th Regiment Ohio Volunteer Infantry
- 169th Regiment Ohio Volunteer Infantry
- 16th Ohio Independent Battery of Ohio Volunteer Artillery
- 16th Regiment Ohio Volunteer Infantry (Three Months Service)
- 16th Regiment Ohio Volunteer Infantry (Three Years Service)
- 170th Regiment Ohio Volunteer Infantry
- 171st Regiment Ohio Volunteer Infantry
- 172nd Regiment Ohio Volunteer Infantry
- 173rd Regiment Ohio Volunteer Infantry
- 174th Regiment Ohio Volunteer Infantry
- 175th Regiment Ohio Volunteer Infantry
- 176th Regiment Ohio Volunteer Infantry
- 177th Regiment Ohio Volunteer Infantry
- 178th Regiment Ohio Volunteer Infantry
- 179th Regiment Ohio Volunteer Infantry
- 17th Ohio Independent Battery of Ohio Volunteer Artillery
- 17th Regiment Ohio Volunteer Infantry (Three Months Service)
- 180th Regiment Ohio Volunteer Infantry
- 181st Regiment Ohio Volunteer Infantry
- 182nd Regiment Ohio Volunteer Infantry
- 183rd Regiment Ohio Volunteer Infantry
- 184th Regiment Ohio Volunteer Infantry
- 185th Regiment Ohio Volunteer Infantry
- 187th Regiment Ohio Volunteer Infantry
- 188th Regiment Ohio Volunteer Infantry
- 189th Regiment Ohio Volunteer Infantry
- 18th Ohio Independent Battery of Ohio Volunteer Artillery
- 18th Regiment Ohio Volunteer Infantry (Three Months Service)
- 190th Regiment Ohio Volunteer Infantry
- 191st Regiment Ohio Volunteer Infantry
- 192nd Regiment Ohio Volunteer Infantry
- 193rd Regiment Ohio Volunteer Infantry
- 194th Regiment Ohio Volunteer Infantry
- 195th Regiment Ohio Volunteer Infantry
- 196th Regiment Ohio Volunteer Infantry
- 197th Regiment Ohio Volunteer Infantry
- 198th Regiment Ohio Volunteer Infantry
- 19th Ohio Independent Battery of Ohio Volunteer Artillery
- 19th Regiment Ohio Volunteer Infantry (Three Months Service)
- 1st Battalion Governor's Guards
- 1st Independent Company Ohio Volunteer Sharpshooters
- 1st Ohio Independent Battery of Ohio Volunteer Artillery
- 1st Ohio Independent Cavalry Company
- 1st Regiment Kentucky Volunteer Infantry
- 1st Regiment Ohio Heavy Artillery
- 1st Regiment Ohio Light Artillery (State Organization)
- 1st Regiment Ohio Light Artillery of Ohio Volunteer Artillery (Three Months Service)
- 1st Regiment Ohio Volunteer Infantry (Three Months Service)
- 1st Regiment Ohio Volunteer Infantry (Three Years Service)
- 1st Regiment United States Veteran Volunteer Infantry Company K
- 1st Regiment West Virginia Cavalry
- 20th Ohio Independent Battery of Ohio Volunteer Artillery
- 20th Regiment Ohio Volunteer Infantry (Three Months Service)
- 21st Ohio Independent Battery of Ohio Volunteer Artillery
- 21st Regiment Ohio Volunteer Infantry (Three Months Service)
- 22nd Ohio Independent Battery of Ohio Volunteer Artillery
- 22nd Regiment Ohio Volunteer Infantry (Three Months Service)
- 23rd Ohio Independent Battery of Ohio Volunteer Artillery
- 24th Ohio Independent Battery of Ohio Volunteer Artillery
- 25th Ohio Independent Battery of Ohio Volunteer Artillery
- 26th Ohio Independent Battery of Ohio Volunteer Artillery
- 2nd Independent Company Ohio Volunteer Sharpshooters
- 2nd Ohio Battery (Ohio National Guard)
- 2nd Ohio Independent Battalion of Cavalry
- 2nd Ohio Independent Battery of Ohio Volunteer Artillery
- 2nd Regiment Kentucky Volunteer Infantry
- 2nd Regiment Ohio Volunteer Infantry (Three Months Service)
- 2nd Regiment Ohio Volunteer Infantry (three years service)
- 2nd Regiment United States Veteran Volunteer Infantry Companies C, F, and G
- 2nd Regiment United States Veteran Volunteer Infantry Company I
- 31st Regiment Ohio Volunteer Infantry
- 33rd Regiment Ohio Volunteer Infantry
- 35th Regiment Ohio Volunteer Infantry
- 3rd Battery Kansas Artillery
- 3rd Independent Company Ohio Volunteer Sharpshooters
- 3rd Ohio Independent Battery of Ohio Volunteer Artillery (Three Months Service)
- 3rd Ohio Independent Battery of Ohio Volunteer Artillery (Three Years Service)
- 3rd Ohio Independent Cavalry Company
- 3rd Regiment Ohio Volunteer Infantry (Three Months Service)
- 40th Regiment Ohio Volunteer Infantry
- 44th Regiment Ohio Volunteer Infantry
- 45th Regiment Ohio Volunteer Infantry
- 48th Regiment Ohio Volunteer Infantry
- 4th Ohio Independent Battalion of Cavalry
- 4th Ohio Independent Battery of Ohio Volunteer Artillery
- 4th Ohio Independent Cavalry Company
- 4th Regiment Ohio Volunteer Infantry (Three Months Service)
- 4th Regiment United States Veteran Volunteer Infantry Companies D and K
- 4th Regiment United States Veteran Volunteer Infantry Company A
- 4th Regiment Virginia Volunteer Infantry
- 4th Regiment West Virginia Volunteer Infantry
- 50th Regiment Ohio Volunteer Infantry
- 51st Regiment Ohio Volunteer Infantry
- 54th Regiment Ohio Volunteer Infantry
- 58th Regiment Ohio Volunteer Infantry
- 59th Regiment Ohio Volunteer Infantry
- 5th Independent Company Ohio Volunteer Cavalry
- 5th Ohio Independent Battery of Ohio Volunteer Artillery
- 5th Ohio Independent Cavalry Battalion
- 5th Regiment Ohio Volunteer Infantry (Three Months Service)
- 5th Regiment United States Colored Troops
- 5th Regiment United States Veteran Volunteer Infantry Companies F, G, H, and K
- 5th Regiment United States Veteran Volunteer Infantry Company C
- 5th Regiment United States Veteran Volunteer Infantry Company D
- 60th Regiment Ohio Volunteer Infantry (One Year Service)
- 60th Regiment Ohio Volunteer Infantry (Three Years Service)
- 61st Regiment Ohio Volunteer Infantry
- 62nd Regiment Ohio Volunteer Infantry
- 63rd Regiment Ohio Volunteer Infantry
- 65th Regiment Ohio Volunteer Infantry
- 66th Regiment Ohio Volunteer Infantry
- 67th Regiment Ohio Volunteer Infantry
- 69th Regiment Ohio Volunteer Infantry
- 6th Regiment Ohio Volunteer Infantry (Three Months Service)
- 6th Regiment Ohio Volunteer Militia
- 6th Regiment United States Veteran Volunteer Infantry Companies E, G, and H
- 70th Regiment Ohio Volunteer Infantry
- 71st Regiment Ohio Volunteer Infantry
- 76th Regiment Ohio Volunteer Infantry
- 77th Regiment Ohio Volunteer Infantry
- 7th Independent Company Ohio Volunteer Sharpshooters
- 7th Ohio Independent Battery of Ohio Volunteer Artillery
- 7th Regiment Ohio Volunteer Infantry (Three Months Service)
- 84th Regiment Ohio Volunteer Infantry
- 85th Regiment Ohio Volunteer Infantry
- 86th Regiment Ohio Volunteer Infantry (Six Months' Service)
- 86th Regiment Ohio Volunteer Infantry (Three Months' Service)
- 87th Regiment Ohio Volunteer Infantry (Three Months Service)
- 88th Regiment Ohio Volunteer Infantry (Three Months Service)
- 88th Regiment Ohio Volunteer Infantry (Three Years Service)
- 8th Ohio Battery (Ohio National Guard)
- 8th Ohio Independent Battery of Ohio Volunteer Artillery
- 8th Regiment Ohio Volunteer Infantry (Three Months Service)
- 8th Regiment Ohio Volunteer Militia
- 8th Regiment United States Veteran Volunteer Infantry Companies A, C, and E
- 95th Regiment Ohio Volunteer Infantry
- 96th Battalion Ohio Volunteer Infantry
- 96th Regiment Ohio Volunteer Infantry
- 97th Regiment Ohio Volunteer Infantry
- 98th Regiment Ohio Volunteer Infantry
- 99th Regiment Ohio Volunteer Infantry
- 9th Ohio Independent Battery of Ohio Volunteer Artillery
- 9th Regiment Ohio Volunteer Infantry (Three Months Service)
- 9th Regiment Ohio Volunteer Infantry (Three Years Service)
- Abraham Lincoln
- Albert Sidney Johnston
- Aleshire's Battery of Ohio Volunteer Artillery
- Alexander McDowell McCook
- Ambrose Burnside
- Ambrose Powell Hill
- American Civil War Army Units
- American Civil War Military Units
- Andrew Johnson
- Anson George McCook
- Anti-war Protests
- Arthur Fremantle
- Atlanta Campaign
- Bard's Company of Ohio Volunteer Cavalry
- Battery A, 1st Regiment Ohio Light Artillery (Federal Organization)
- Battery A, 2nd Regiment Ohio Heavy Artillery
- Battery B, 1st Regiment Ohio Light Artillery (Federal Organization)
- Battery B, 2nd Regiment Ohio Heavy Artillery
- Battery C, 1st Regiment Ohio Light Artillery (Federal Organization)
- Battery C, 2nd Regiment Ohio Heavy Artillery
- Battery D, 1st Regiment Ohio Light Artillery (Federal Organization)
- Battery D, 2nd Regiment Ohio Heavy Artillery
- Battery E, 2nd Regiment Ohio Heavy Artillery
- Battery F, 1st Regiment Ohio Light Artillery (Federal Organization)
- Battery F, 2nd Regiment Ohio Heavy Artillery
- Battery G, 1st Regiment Ohio Light Artillery (Federal Organization)
- Battery G, 2nd Regiment Ohio Heavy Artillery
- Battery H, 1st Regiment Ohio Light Artillery (Federal Organization)
- Battery H, 2nd Regiment Ohio Heavy Artillery
- Battery I, 1st Regiment Ohio Light Artillery (Federal Organization)
- Battery I, 2nd Regiment Ohio Heavy Artillery
- Battery K, 1st Regiment Ohio Light Artillery (Federal Organization)
- Battery K, 2nd Regiment Ohio Heavy Artillery
- Battery L, 1st Regiment Ohio Light Artillery (Federal Organization)
- Battery L, 2nd Regiment Ohio Heavy Artillery
- Battery M, 1st Regiment Ohio Light Artillery (Federal Organization)
- Battery M, 2nd Regiment Ohio Heavy Artillery
- Battle of Adairsville
- Battle of Antietam
- Battle of Appomattox Court House
- Battle of Appomattox Station
- Battle of Arkansas Post
- Battle of Atlanta
- Battle of Bean's Station
- Battle of Beaver Dam Creek
- Battle of Bentonville
- Battle of Big Black River Bridge
- Battle of Boonville
- Battle of Brandy Station
- Battle of Brown's Mill
- Battle of Buffington Island
- Battle of Bull Run I
- Battle of Bull Run II
- Battle of Campbell's Station
- Battle of Carnifex Ferry
- Battle of Cedar Creek
- Battle of Cedar Mountain
- Battle of Champion Hill
- Battle of Chancellorsville
- Battle of Chantilly
- Battle of Chattanooga
- Battle of Chickamauga
- Battle of Chickasaw Bayou
- Battle of Cloyd's Mountain
- Battle of Cold Harbor
- Battle of Columbia
- Battle of Corinth II
- Battle of Corrick's Ford
- Battle of Cross Keys
- Battle of Crow Valley
- Battle of Culpeper Court House
- Battle of Cumberland Church
- Battle of Cumberland Gap
- Battle of Dallas
- Battle of Dalton I
- Battle of Dalton II
- Battle of Dinwiddie Court House
- Battle of Droop Mountain
- Battle of Ezra Church
- Battle of Fisher's Hill
- Battle of Five Forks
- Battle of Fort DeRussy
- Battle of Fort Donelson
- Battle of Fort Fizzle
- Battle of Fort Henry
- Battle of Fort Sanders
- Battle of Fort Stevens
- Battle of Franklin
- Battle of Fredericksburg
- Battle of Front Royal
- Battle of Gaines' Mill
- Battle of Gettysburg
- Battle of Gilgal Church
- Battle of Glendale
- Battle of Greenbrier River
- Battle of Hatchie's Bridge
- Battle of Haw's Shop
- Battle of High Bridge
- Battle of Iuka
- Battle of Jonesborough
- Battle of Kennesaw Mountain
- Battle of Kernstown I
- Battle of Kolb's Farm
- Battle of Lewis’s Farm
- Battle of Lookout Mountain
- Battle of Lovejoy's Station
- Battle of Malvern Hill
- Battle of Mansfield
- Battle of McDowell
- Battle of Meridian
- Battle of Middle Creek
- Battle of Middle Fork Bridge
- Battle of Mill Springs
- Battle of Missionary Ridge
- Battle of Monocacy
- Battle of Namozine Church
- Battle of Nashville
- Battle of New Hope Church
- Battle of New Market
- Battle of North Anna
- Battle of Oak Grove
- Battle of Opequon
- Battle of Orchard Knob
- Battle of Pea Ridge
- Battle of Peachtree Creek
- Battle of Perryville
- Battle of Petersburg III
- Battle of Philippi
- Battle of Pickett's Mill
- Battle of Piedmont
- Battle of Pigeon Roost
- Battle of Pine Mountain
- Battle of Pleasant Hill
- Battle of Port Republic
- Battle of Raymond
- Battle of Resaca
- Battle of Rice's Station
- Battle of Rich Mountain
- Battle of Ringgold Gap
- Battle of Rocky Face Ridge
- Battle of Saint Mary's Church
- Battle of Savage's Station
- Battle of Selma
- Battle of Seven Pines
- Battle of Shiloh
- Battle of Spotsylvania Court House
- Battle of Spring Hill
- Battle of Stones River
- Battle of Sutherland's Station
- Battle of the Wilderness
- Battle of Tom's Brook
- Battle of Totopotomoy Creek
- Battle of Trevilian Station
- Battle of Utoy Creek
- Battle of Wauhatchie
- Battle of Waynesboro
- Battle of White Oak Road
- Battle of Wilson's Creek
- Battle of Wilson's Creek
- Battle of Winchester I
- Battle of Yellow Tavern
- Benjamin Franklin Wade
- Blount's Battery of Ohio Volunteer Artillery
- Braxton Bragg
- Buffington Island
- Burnap's Battery of Ohio Volunteer Artillery
- Burrows’ Battery of Ohio Volunteer Artillery
- Bushrod Rust Johnson
- Camp Akron
- Camp Ammen
- Camp Anderson
- Camp Andrews
- Camp Brough
- Camp Brough (Nashville, Tennessee)
- Camp Brown
- Camp Buckingham
- Camp Carlisle
- Camp Carrington
- Camp Chase
- Camp Circleville
- Camp Clark
- Camp Clay
- Camp Cleveland
- Camp Colerain
- Camp Corwin
- Camp Curley
- Camp Cuyahoga
- Camp Dayton
- Camp Defiance
- Camp Delaware
- Camp Dennison
- Camp Dennison (Wooster, Ohio)
- Camp Dick Corwin
- Camp Fairgrounds
- Camp Gallipolis
- Camp Georgetown
- Camp Giddings
- Camp Goddard (Columbus, Ohio)
- Camp Goddard (Zanesville, Ohio)
- Camp Gurley
- Camp Hamer
- Camp Hamilton
- Camp Harrison
- Camp Hill
- Camp Hutchins
- Camp Ironton
- Camp Jackson
- Camp Jefferson
- Camp Jewett
- Camp John McLean
- Camp Latta
- Camp Lew Wallace
- Camp Lima
- Camp Logan
- Camp Lowe
- Camp Lucas (Olive Branch, Ohio)
- Camp Lucas (Toledo, Ohio)
- Camp Mansfield
- Camp Marietta
- Camp Massillon
- Camp McArthur
- Camp McClellan (Marietta, Ohio)
- Camp McClellan (Norwalk, Ohio)
- Camp Meigs
- Camp Mingo
- Camp Monroe
- Camp Monroeville
- Camp Mordecai Bartley
- Camp Morrow
- Camp Neibling
- Camp Noble
- Camp Norwalk
- Camp Piqua
- Camp Portsmouth
- Camp Putnam
- Camp Ralph Buckland
- Camp Repose
- Camp Ripley
- Camp Scott
- Camp Shady
- Camp Sherman
- Camp Simon Kenton
- Camp Springfield
- Camp Steubenville
- Camp Taylor
- Camp Thomas
- Camp Tiffin
- Camp Tod (Cleveland, Ohio)
- Camp Tod (Troy, Ohio)
- Camp Toledo
- Camp Vance
- Camp Wade
- Camp West Union
- Camp Wood
- Camp Wool
- Camp Worcester (Monroeville, Ohio)
- Camp Worcester (Norwalk, Ohio)
- Camp Worthington (Chillicothe, Ohio)
- Camp Worthington (Worthington, Ohio)
- Camp Xenia
- Camp Zanesville
- Carolinas Campaign
- Carrington Guards
- Charles Anderson
- Charles Clark
- Charles Ewing
- Charles H. Cole
- Charles Morris McCook
- Chattanooga Campaign
- Cincinnati Rover Guards
- Civil Rights Act of 1866
- Clement Vallandigham
- Columbus Fencibles
- Columbus Videttes
- Committee of Thirty-three
- Companies G, H, and K 66th Regiment Illinois Infantry
- Company M, 11th Regiment Pennsylvania Cavalry
- Compromise of 1850
- Confederate Heartland Offensive
- Confiscation Act of 1861
- Confiscation Act of 1862
- Conscription Act and Enrollment Act
- Copperheads
- Corwin Amendment
- Covington Blues
- Crittenden Compromise
- Daniel Harris Reynolds
- Daniel McCook
- Daniel McCook, Jr.
- Daniel McCoy
- David Tod
- Dayton Light Guards
- Dennison Guards
- Departmental Corps Ohio Volunteer Infantry
- Don Carlos Buell
- Early's Raid
- East Tennessee Campaign
- Edson Baldwin Olds
- Edward Moody McCook
- Edwin McMasters Stanton
- Edwin Stanton McCook
- Emancipation Proclamation
- Erastus Bernard Tyler
- Felix Kirk Zollicoffer
- Fifteenth Amendment
- Fighting McCooks
- Fitz John Porter
- Fourteenth Amendment
- Franklin-Nashville Campaign
- Freedmen's Bureau
- Freeport Doctrine
- Fremont Body Guard
- Fugitive Slave Act of 1793
- Fugitive Slave Act of 1850
- G.F. Wiles
- Gag Rule
- General Order No. 38
- George Armstrong Custer
- George Brinton McClellan
- George Crook
- George Edward Pickett
- George Gordon Meade
- George Henry Thomas
- George Hunt Pendleton
- George Wythe McCook
- Gilbert Van Zandt
- Guthrie Gray Battalion
- Hadley's Battery of Ohio Volunteer Artillery
- Harlan's Light Cavalry
- Henry Christopher McCook
- Henry Wager Halleck
- Hibernian Guards
- Hickenlooper's Battery of Ohio Volunteer Artillery
- Hill's Battery of Ohio Volunteer Artillery
- Hoffman Battalion
- Hoffman’s Battery of Ohio Volunteer Artillery
- Hugh Boyle Ewing
- Hugh Judge Jewett
- Hundred Days' Men
- Irvin McDowell
- Isaac Ingalls Stevens
- Jackson Guards
- Jacob Dolson Cox
- James Birdseye McPherson
- James Blair Steedman
- James Ewell Brown "JEB" Stuart
- James Longstreet
- James Mitchell Ashley
- James Monroe Trotter
- Jefferson Finis Davis
- John Alexander McClernand
- John Armor Bingham
- John Bell Hood
- John Brough
- John Cabell Breckinridge
- John Crafts Wright
- John E. Cummins
- John Hunt Morgan
- John James McCook (Lawyer)
- John James McCook (Physician)
- John James McCook (Professor)
- John McAllister Schofield
- John Pope
- John Potts Slough
- John R.
- John Yates Beall
- Johnson's Island
- Joint Committee on Reconstruction
- Joint Committee on the Conduct of the War
- Joseph Bailey
- Joseph Eggleston Johnston
- Joseph Hooker
- Joshua Lawrence Chamberlain
- Joshua Reed Giddings
- Jubal Anderson Early
- Kansas-Nebraska Act
- Kirby Smith
- Knoxville Campaign
- Lafayette Guards (Cincinnati)
- Lafayette Guards (Dayton)
- Lancaster Guards
- Latimer A. McCook
- Lew Wallace
- Lewis Addison Armistead
- Lyman Trumbull
- Lynchburg Campaign
- Mansfield Guards
- Marietta Operations
- Markgraf's Battery of Ohio Volunteer Artillery
- Mary Ann (Ball) Bickerdyke
- Maryland Campaign
- McLaughlin's Squadron of Cavalry
- McMullin's Battery of Ohio Volunteer Artillery
- Melancthon Smith Wade
- Militia Act of 1862
- Missouri Compromise
- Missouri Compromise (Transcript)
- Mitchell's Battery of Ohio Volunteer Artillery
- Montgomery Guards
- Morgan's Raid
- Morgan's Raiders
- Mortimer Dormer Leggett
- Mount Adams Battery
- Nathaniel Lyon
- Nathaniel Prentice Banks
- Neil's Battery of Ohio Volunteer Artillery
- Ohio Volunteer Infantry
- Oliver Otis Howard
- Operations in Western Virginia Campaign
- Order of American Knights
- Overland Campaign
- Patrick Ronayne Cleburne
- Patterson's Battery of Ohio Volunteer Artillery
- Paulsen's Battery of Ohio Volunteer Artillery
- Peace Democrats
- Peninsula Campaign
- Philip Henry Sheridan
- Philip Kearny
- Pickett's Charge
- Pierre Gustave Toutant Beauregard
- Portsmouth Guards
- Potts' Battery of Ohio Volunteer Artillery
- Preliminary Emancipation Proclamation
- Price’s Hill Battery
- Prigg v. Pennsylvania
- Randal Rust
- Reconstruction Acts
- Red River Campaign
- Relief Law
- Richard Brooke Garnett
- Richard Stoddert Ewell
- Richard Strother Taylor
- Robert Cumming Schenck
- Robert Edward Lee
- Robert Hatton
- Robert Latimer McCook
- Robert Selden Garnett
- Roderick Sheldon McCook
- Roswell Sabine Ripley
- Salmon Portland Chase
- Samuel Medary
- Samuel Peter Heintzelman
- Samuel Spriggs Carroll
- Samuel Sullivan Cox
- Sands’ Battery of Ohio Volunteer Artillery
- Scott v. Sandford
- Seven Days Battles
- Shenandoah Valley Campaign of 1862
- Shenandoah Valley Campaign of 1864
- Sheridan's Valley Campaign
- Sherman's Body-Guard
- Sherman's March to the Sea
- Sherman's March to the Sea
- Shields' Battery of Ohio Volunteer Artillery
- Siege of Corinth
- Siege of Vicksburg
- Smithnight's Battery of Ohio Volunteer Artillery
- Spear's Battery of Ohio Volunteer Artillery
- Springfield Zouaves
- Sterling Price
- Surrender at Appomattox Court House
- Tenure of Office Act
- Thaddeus Stevens
- Thirteenth Amendment
- Thomas Corwin
- Thomas Ewing Jr.
- Thomas Ewing Sr.
- Thomas Jonathon Jackson
- Thomas MacArthur Anderson
- Tod Barracks
- Tribe of Dan
- Tribe of John
- Trumbull Guards
- Tullahoma Campaign
- U.S. Army General Hospital at Gallipolis
- U.S. General Hospital at Cleveland
- U.S.S. Michigan
- Ulysses S. Grant
- Union Light Guard
- Union Party
- Vicksburg Campaign
- Wade-Davis Bill
- Wager Swayne
- Wallace Guards
- Washington Peace Conference
- White’s Battery of Ohio Volunteer Artillery
- William Allen
- William Dennison, Jr.
- William H. Dupree
- William Henry Seward
- William Marshall Anderson
- William McKinley, Jr.
- William Seward Pierson
- William Starke Rosecrans
- William Tecumseh Sherman
- William Thomas Harbaugh Brooks
- Williams’ Battery of Ohio Volunteer Artillery (Three Years Service)
- Wilmot Proviso
- Wilson's Raid
- Winfield Scott Hancock
- York’s Battery of Ohio Volunteer Artillery
- Yost's Captured Battery of Ohio Volunteer Artillery
- Zanesville Guards
- Zouave Guards (Cincinnati)