90th Ohio Infantry ​in the American Civil War

Overview

The 90th Ohio Infantry (Three Years’ Service) was an infantry regiment from Ohio that served in the Union Army during the American Civil War. Organized at Camp Circleville and mustered in on August 29, 1862, the regiment was composed of 38 commissioned officers and 943 enlisted men. The unit served primarily in the Western Theater and participated in several major campaigns and battles, including Stone’s River, Chickamauga, the Atlanta Campaign, Franklin, and Nashville.

This regiment was part of the Union forces that advanced through Kentucky, Tennessee, Georgia, and into Alabama, contributing to key operations against Confederate armies in the region.

Organization & Service

The 90th Ohio Infantry (Three Years’ Service) was organized at Camp Circleville, Ohio, and mustered into service on August 29, 1862. The regiment immediately moved to Covington, Kentucky, reporting to Major General Horatio G. Wright two days after organization. The unit conducted various marches in Kentucky during the fall of 1862 and approached within two miles of the Battle of Perryville, but did not participate in the engagement.

The regiment’s first major combat occurred at the Battle of Stone’s River (Murfreesboro) in late December 1862 and early January 1863, where it sustained significant casualties. The 90th Ohio remained in the vicinity of Murfreesboro for several months before moving forward to participate in the Battle of Chickamauga in September 1863, again suffering notable losses.

During the winter of 1863–1864, the regiment camped at Ooltewah, Tennessee. In the spring of 1864, it joined the Atlanta Campaign, marching and fighting for 120 days until the capture of Atlanta. Following the fall of Atlanta, the regiment pursued Confederate General Hood into Tennessee, participating in the battles of Franklin and Nashville. After the Union victory at Nashville, the 90th Ohio joined in the pursuit of retreating Confederate forces to the Tennessee River.

The original members of the regiment were mustered out on June 13, 1865. Remaining recruits were mustered out on October 3, 1865.

Engagements & Campaigns

• Marches and operations in Kentucky (1862)
• Battle of Stone’s River (December 31, 1862 – January 2, 1863)
• Battle of Chickamauga (September 19–20, 1863)
• Winter encampment at Ooltewah, Tennessee (1863–1864)
• Atlanta Campaign (May–September 1864)
• Battle of Franklin (November 30, 1864)
• Battle of Nashville (December 15–16, 1864)
• Pursuit of Hood to the Tennessee River (December 1864)

Casualties

The 90th Ohio Infantry (Three Years’ Service) suffered significant losses in several major engagements. At Stone’s River, the regiment lost 130 men killed, wounded, or missing. At Chickamauga, 88 men were reported killed, wounded, or missing. Comprehensive totals for the entire service period are not fully detailed in available primary sources.

Field Officers & Commanders

• Colonel Isaac N. Ross
• Colonel Charles H. Rippey
• Lieutenant Colonel Samuel N. Yeoman
• Major Alvah Perry
• Major George Angle
• Major Nicholas F. Hitchcock

Regimental Roster

The complete roster of the 90th Ohio Infantry (Three Years’ Service), including officers and enlisted men, is available for genealogical and historical research. The roster provides names, ranks, and service details for those who served in the regiment.

To view the full roster, visit the 90th Ohio Infantry (Three Years’ Service) Roster page.

Sources & References

• Official Records of the Union and Confederate Armies, Series I, Volumes XVI, XX, XXIII, XXXVIII
• Ohio Roster Commission, Official Roster of the Soldiers of the State of Ohio in the War of the Rebellion, 1861–1866
• Dyer, Frederick H., A Compendium of the War of the Rebellion
• Fox, William F., Regimental Losses in the American Civil War
• The Union Army, Federal Publishing Company, 1908, Volume 2