Overview
The 149th Ohio Infantry (One Hundred Days’ Service) was an infantry regiment organized at Camp Dennison, Ohio, between May 8 and May 11, 1864, for service in the Union Army during the American Civil War. The regiment was composed primarily of men from the 27th Regiment, Ohio National Guard (Ross County), and the 55th Battalion, Ohio National Guard (Clinton County). It served for a term of 100 days, primarily in the Middle Department and the Army of the Potomac’s operational areas in Maryland and Virginia.
Organization & Service
The 149th Ohio Infantry (One Hundred Days’ Service) was mustered into service at Camp Dennison in early May 1864. Shortly after organization, the regiment departed Ohio on May 11, 1864, and proceeded to Baltimore, Maryland. There, it was assigned to garrison duty at various forts in and around the city until May 29. The regiment was then ordered to the eastern shore of Maryland, where its companies were distributed at several points for guard and security duties.
In early July, the regiment was ordered to Monocacy Junction, Maryland. On July 9, 1864, it participated in the Battle of Monocacy, suffering significant losses in killed, wounded, and prisoners. Following this engagement, the 149th Ohio Infantry joined the 6th and 19th Corps in movements through Maryland and Virginia. Portions of the regiment were present with the 144th Ohio Infantry during an attack by Mosby’s guerrillas at Berryville, Virginia. The regiment returned to Ohio on August 20, 1864, and was mustered out of service at Camp Dennison on August 30, 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
- Garrison duty at Baltimore, Maryland (May 1864)
- Eastern Shore of Maryland (May–July 1864)
- Battle of Monocacy, Maryland (July 9, 1864)
- Marches with the 6th and 19th Corps in Maryland and Virginia (July–August 1864)
- Action at Berryville, Virginia (with the 144th Ohio Infantry, July 1864)
Casualties
The 149th Ohio Infantry (One Hundred Days’ Service) lost approximately 30 men killed and wounded at the Battle of Monocacy. Over 100 members of the regiment were taken prisoner during the same engagement. Complete figures for deaths from disease or total losses during the term are not specified in available primary sources.
Field Officers & Commanders
- Colonel Allison L. Brown
- Lieutenant Colonel Owen West
- Major Ebenezer Rozelle
Regimental Roster
The full roster of the 149th Ohio Infantry (One Hundred Days’ Service), including officers and enlisted men, is available on the regiment’s roster page. This roster provides names, ranks, and additional service details for those who served in the unit during its 100 days of service.
To view the complete roster, visit the 149th Ohio Infantry (One Hundred Days’ Service) Roster page.
Sources & References
- Official Records of the Union and Confederate Armies, Series I, Vol. 37, Part 1, Part 2
- Ohio Roster Commission, Official Roster of the Soldiers of the State of Ohio in the War of the Rebellion, Vol. 7
- Dyer, Frederick H., A Compendium of the War of the Rebellion
- The Union Army, Vol. 2 (Federal Publishing Company, 1908)