Overview
The 133rd Ohio Infantry (One Hundred Days’ Service) was an infantry regiment organized in Ohio for Federal service during the American Civil War. Mustered at Camp Chase on May 6, 1864, the regiment was composed of companies drawn from the 58th Battalion Ohio National Guard (Hancock County) and the 76th Battalion Ohio National Guard (Franklin County). The unit served in the Union Army, primarily in the Eastern Theater, and was mustered out on August 20, 1864.
This regiment’s service was part of the larger mobilization of Ohio National Guard units for 100 days’ duty in 1864, intended to provide rear-area security and free veteran troops for front-line operations.
Organization & Service
The 133rd Ohio Infantry (One Hundred Days’ Service) was organized at Camp Chase, Ohio, on May 6, 1864. The regiment consisted of two companies from the 58th Battalion Ohio National Guard and two companies from the 76th Battalion Ohio National Guard. Upon organization, the regiment was immediately ordered to Parkersburg, West Virginia, arriving there on May 8, 1864.
From Parkersburg, the regiment was sent to New Creek, and subsequently ordered to Washington, D.C. On June 7, 1864, the regiment was directed to Bermuda Hundred, Virginia, arriving there on June 12. On June 16, the brigade to which the 133rd Ohio was attached was ordered to destroy the Richmond & Petersburg Railroad. The regiment was assigned to support an artillery battery, participating in a cannonade against Confederate forces and, with other troops, held the enemy in check for approximately five hours.
On July 17, 1864, the regiment embarked at Point of Rocks and proceeded to Fort Powhatan, Virginia. There, it was employed in fortification work and in repairing telegraph lines. On August 10, the regiment returned to Washington, D.C., and then to Camp Chase, Ohio, where it was mustered out of service on August 20, 1864.
Research This Regiment Further
If you’d like to explore this unit’s history in more depth, regimental histories and Civil War reference works offer valuable detail.
Engagements & Campaigns
- Operations at Bermuda Hundred, Virginia (June 1864)
- Destruction of the Richmond & Petersburg Railroad (June 16, 1864)
- Defense and support operations at Fort Powhatan (July–August 1864)
Casualties
Specific casualty figures for the 133rd Ohio Infantry (One Hundred Days’ Service) are not detailed in primary sources. The regiment’s service was primarily in support and defensive roles, and it did not participate in major pitched battles.
Field Officers & Commanders
- Colonel Gustavus S. Innis
- Lieutenant Colonel William Ewing
- Major Joseph M. Clark
Regimental Roster
The full roster of the 133rd Ohio Infantry (One Hundred Days’ 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 during its term of service.
To view the complete roster, visit the 133rd Ohio Infantry (One Hundred Days’ Service) Roster page.
Sources & References
- Official Records of the Union and Confederate Armies, Series I, Vol. 37, Part II
- Ohio Roster Commission, Official Roster of the Soldiers of the State of Ohio in the War of the Rebellion, Vol. 8
- Dyer, Frederick H., A Compendium of the War of the Rebellion
- The Union Army, Vol. 2 (Federal Publishing Company, 1908)