Overview
The 142nd 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 13, 1864, the regiment served a short-term enlistment of 100 days as part of the Union Army. It was primarily composed of men from Knox, Williams, and Coshocton counties, and was assigned to duty in the Eastern Theater, including service in West Virginia, the defenses of Washington, D.C., and operations supporting the Army of the Potomac.
This unit is distinct from any other Ohio regiments with similar designations or service terms.
Organization & Service
The 142nd Ohio Infantry (One Hundred Days’ Service) was formed at Camp Chase, Ohio, on May 13, 1864. The regiment was composed of the 22nd Battalion, Ohio National Guard (Knox County), the 68th Battalion (Williams County), and part of the 69th Battalion (Coshocton County). The unit departed Columbus for Martinsburg, West Virginia, on May 14, 1864, where it remained until May 19.
From Martinsburg, the regiment moved to Washington, D.C., and then marched to Fort Lyon, remaining there until June 5. Upon receiving orders, the regiment reported to General Abercrombie at White House Landing. On June 7, the regiment embarked from Alexandria by steamer, arriving at White House on June 9. It was immediately tasked with guarding a supply train through the Wilderness to General Grant’s front near Cold Harbor. Subsequently, the regiment was ordered to Bermuda Hundred, but was redirected by transport to Point of Rocks without landing at Bermuda Hundred. On August 19, 1864, the regiment was ordered to return to Washington, D.C., and then to Camp Chase, Ohio, where it was mustered out of service on September 2, 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
- Duty at Martinsburg, West Virginia (May 1864)
- Defenses of Washington, D.C. (May–June 1864)
- Operations at Fort Lyon
- Guarding supply trains to Grant’s front near Cold Harbor (June 1864)
- Movement to White House Landing and Point of Rocks
Casualties
Specific casualty figures for the 142nd Ohio Infantry (One Hundred Days’ Service) are not detailed in primary sources. The regiment’s service was primarily in garrison and guard duty, and it did not participate in major combat actions.
Field Officers & Commanders
- Colonel William C. Cooper
- Lieutenant Colonel William Rogers
- Major William M. Young
Regimental Roster
The full roster of the 142nd Ohio Infantry (One Hundred Days’ Service), including officers and enlisted men, is available for genealogical and historical research. For a complete listing of soldiers who served in this regiment, please visit the regimental roster page.
Sources & References
- Official Records of the Union and Confederate Armies, Series I, Vol. 37
- Ohio Roster Commission, Official Roster of the Soldiers of the State of Ohio in the War of the Rebellion, Vol. 9
- Dyer, Frederick H., A Compendium of the War of the Rebellion
- The Union Army, Vol. 2 (Federal Publishing Company, 1908)