The Union order of battle during the Battle of Gettysburg includes the American Civil War officers and men of the Army of the Potomac. Order of battle compiled from the army organization during the battle, the casualty returns and the reports.
The 1st Ohio Infantry Regiment was an infantry regiment in the Union Army during the American Civil War. It served in the Western Theater in a number of campaigns and battles.
The 2nd Ohio Infantry Regiment was an infantry regiment in the Union Army during the American Civil War.
The following Union Army units and commanders fought in the Battle of Chickamauga of the American Civil War. The Confederate order of battle is listed separately. Order of battle compiled from the army organization during the campaign.
The following Union Army units and commanders fought in the Battle of Fredericksburg of the American Civil War. Order of battle compiled from the army organization during the campaign. The Confederate order of battle is listed separately.
The 3rd Ohio Infantry Regiment was an infantry regiment in the Union Army during the American Civil War. It served in several important campaigns in the Western Theater in Kentucky, Tennessee, and Alabama.
The 13th Ohio Infantry Regiment was an infantry regiment in the Union Army during the American Civil War.
The 51st Ohio Infantry Regiment was an infantry regiment of the Union Army during the American Civil War.
The 65th Ohio Infantry Regiment was an infantry regiment in the Union Army during the American Civil War.
The 17th Ohio Infantry Regiment was an infantry regiment in the Union Army during the American Civil War.
The 35th Ohio Infantry Regiment was an infantry regiment in the Union Army during the American Civil War. It was nicknamed the "Persimmon Regiment"
The 15th Ohio Infantry Regiment was an infantry regiment in the Union Army during the American Civil War.
The following Confederate Army units and commanders fought in the Battle of Mill Springs of the American Civil War on January 19, 1862, near present-day Nancy, Kentucky. The Union order of battle is listed separately.
The following Union Army units and commanders fought in the Battle of Camp Wildcat of the American Civil War on October 21, 1861, in Laurel County, Kentucky. The Confederate order of battle is listed separately.
The 20th Ohio Infantry Regiment was an infantry regiment in the Union Army during the American Civil War.
The 156th Ohio Infantry Regiment, sometimes 156th Ohio Volunteer Infantry was an infantry regiment in the Union Army during the American Civil War.
The 162nd Ohio Infantry Regiment, sometimes 162nd Ohio Volunteer Infantry was an infantry regiment in the Union Army during the American Civil War.
The following Union Army and Confederate Army units and commanders fought in the Battle of Carnifex Ferry of the American Civil War on September 10, 1861, in Nicholas County, Virginia.
The following units and commanders fought in the Chattanooga–Ringgold campaign of the American Civil War on the Union side. The Confederate order of battle is shown separately. Order of battle compiled from the army organization during the campaign, the casualty returns and the reports.
