Overview
The 1st Ohio Veteran Engineers served as a specialized engineer regiment for the Union Army during the American Civil War. Organized primarily from members of the pioneer brigade of the Department of the Cumberland, the regiment was officially formed under Special Orders No. 231, issued by the War Department, Adjutant-General’s Office, Washington, on July 8, 1864. The unit was part of the Union’s Western Theater operations and performed vital engineering and pioneer duties in support of military campaigns.
The regiment’s service was notable for its technical contributions, including the construction and repair of roads, bridges, and fortifications, which were essential to the movement and effectiveness of Union forces in the field.
Organization & Service
The 1st Ohio Veteran Engineers was organized in July 1864, drawing its ranks from experienced soldiers of the pioneer brigade, Department of the Cumberland. The regiment was formed in accordance with Special Orders No. 231, dated July 8, 1864. Its primary role was to provide engineering support to the Union armies operating in the Western Theater.
In March 1865, a new company was organized and assigned as Company L, expanding the regiment’s operational capacity. Throughout its service, the regiment was attached to various commands within the Department of the Cumberland, performing engineering tasks such as building and repairing military infrastructure, including roads, bridges, and defensive works.
The regiment’s members whose terms of service would have expired before October 1, 1865, were mustered out at various dates in June 1865. The remaining personnel continued in service until the final muster out on September 26, 1865.
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
- Engineering support operations in the Department of the Cumberland (1864–1865)
- Construction and repair of roads, bridges, and fortifications in support of Union campaigns in the Western Theater
Casualties
Specific casualty figures for the 1st Ohio Veteran Engineers are not detailed in primary sources. The regiment’s losses were primarily from disease and accidents related to engineering duties rather than direct combat.
Some details are incomplete in surviving primary sources.
Field Officers & Commanders
- Major Patrick O’Connell
Regimental Roster
The full roster of the 1st Ohio Veteran Engineers, including officers and enlisted men, is available for genealogical and historical research. This roster provides names, ranks, and service details for members of the regiment.
To view the complete roster, visit the 1st Ohio Veteran Engineers Roster page.
Sources & References
- The Union Army, Federal Publishing Company, 1908, Vol. 2
- Official Records of the Union and Confederate Armies, Series I
- Ohio Roster Commission, Official Roster of the Soldiers of the State of Ohio in the War of the Rebellion
- Dyer, Frederick H., A Compendium of the War of the Rebellion