The 10th Ohio Infantry Regiment was an infantry regiment in the Union Army during the American Civil War. The regiment was also known as the Montgomery Regiment, and the Bloody Tenth. The 10th Ohio Infantry was predominantly recruited from Irish Americans, but had two companies consisting of German Americans. Service Three-month regiment The 10th Ohio Infantry Regiment was organized at Camp Harrison near Cincinnati, Ohio, and assembled for three months' service on May 7, 1861, under Colonel William Haines Lytle. This was in response to President Lincoln's call for 75,000 volunteers. The regiment moved to Camp Dennison on May 12 and performed duty there until June 3, 1861. The 10th Ohio Infantry discharged on August 21, 1861. Three-years regiment The 10th Ohio Infantry was reorganized at Camp Dennison on June 3, 1861, and assembled for three years of service under the command of Colonel William Haines Lytle. Through September 1861, the regiment was attached to the 2nd Brigade, Army of Occupation, Western Virginia. It was subsequently assigned to Benham's Brigade, Kanawha Division, Western Virginia, and stayed there through October 1861; the 1st Brigade, Kanawha Division, Western Virginia, to November 1861; the 17th Brigade, Army of the Ohio, to December 1861; the 17th Brigade, 3rd Division, Army of the Ohio, to September 1862; the 17th Brigade, 3rd Division, I Corps, Army of the Ohio, to November 1862; the 2nd Brigade, 1st Division, Center, XIV Corps, Army of the Cumberland, to January 1863; the 2nd Brigade, 1st Division, XIV Corps, January 1863; and Headquarters Provost Guard, Department of the Cumberland, to May 1864. The 10th Ohio Infantry disassembled on June 3, 1864. Seventy-five enlisted men whose terms of enlistment had not expired were left unassigned within the Army of the Cumberland until September, then were assigned to the 18th Ohio Infantry. Detailed service 1861 Operations by the 10th Ohio Regiment began quickly. After working up in Ohio, it marched to western Virginia on June 24. Operations ensued in Grafton, Clarksburg and Buckhannon until August. After that, it served in the Western Virginia Campaign from July to September 1861, seeing action at the Battle of Carnifex Ferry on September 10. After some rest, the 10th moved to the Kanawha Valley and New River Region, where it saw action from October 19 to November 24. It participated in the pursuit of Confederate Brig. Gen. John B. Floyd from November 10 to 15 after reaching