121st Ohio Infantry The 121st Ohio Volunteer Infantry ( or 121st OVI ) was an infantry regiment in the Union Army during the American Civil War . Service . The 121st Ohio Infantry was organized at Delaware , Ohio and mustered in for three years service on September 11 , 1862 under the command of Colonel William P . Reed . The regiment was recruited in Delaware , Knox , Logan , Union , Marion , and Morrow counties . The regiment was attached to 34th Brigade , 10th Division , Army of the Ohio , September 1862 . 34th Brigade , 10th Division , I Corps , Army of the Ohio , to November 1862 . District of West Kentucky , Department of the Ohio , to February 1863 . Reed ' s Brigade , Baird ' s Division , Army of Kentucky , Department of the Cumberland , to June 1863 . 2nd Brigade , 1st Division , Reserve Corps , Army of the Cumberland , to October 1863 . 2nd Brigade , 2nd Division , XIV Corps , Army of the Cumberland , to June 1865 . The 121st Ohio Infantry mustered out of service at Washington , D . C . on June 8 , 1865 . Detailed service . Ordered to Cincinnati , September 11 ; thence to Covington , Ky . , September 15 , and to Louisville , Ky . , September 20 . Pursuit of Bragg into Kentucky October 1 – 15 , 1862 . Battle of Perryville , Ky . , October 8 . Moved to Lebanon , Ky . , and duty there until November , and at Columbia until December . Operations against Morgan December 22 , 1862 to January 3 , 1863 . Ordered to Louisville , thence moved to Nashville , Tenn . , February 9 ; thence to Franklin , Tenn . , February 12 , and duty there until June . Tullahoma Campaign June 23 - July 7 . Duty at Fayetteville August 25 - September 5 . Chickamauga Campaign . Battle of Chickamauga September 19 – 21 . Siege of Chattanooga , September 24 - November 23 . Chattanooga - Ringgold Campaign November 23 – 27 . Orchard Knob November 23 . Tunnel Hill November 24 – 25 . Missionary Ridge November 25 . Chickamauga Station November 26 . March to relief of Knoxville , November 28 - December 17 . Duty at Rossville , Ga . , until May 1864 . Atlanta Campaign May 1 to September 8 . Tunnel Hill May 6 – 7 . Demonstration on Rocky Faced Ridge May 8 – 11 . Buzzard ' s Roost Gap May 8 – 9 . Battle of Resaca May 14 – 15 . Advance on Dallas May 18 – 25 . Operations on line of Pumpkin Vine Creek and battles about Dallas , New Hope Church and Allatoona Hills May 25 - June 5 . Operations about Marietta and against Kennesaw Mountain June 10 - July 2 . Pine Hill June 11 – 14 . Lost Mountain June 15 – 17 . Assault on Kennesaw June 27 . Ruff ' s Station July 4 . Chattahoochie River July 5 – 17 . Peachtree Creek July 19 – 20 . Siege of Atlanta July 22 - August 25 . Utoy Creek August 5 – 7 . Flank movement on Jonesboro August 25 – 30 . Battle of Jonesboro August 31 - September 1 . Operations against Forrest and Hood in northern Georgia and northern Alabama September 29 - November 3 . March to the Sea November 15 - December 10 . Sandersville November 26 . Siege of Savannah December 10 – 21 . Campaign of the Carolinas January to April 1865 . Taylor ' s Hole Creek , Aversyboro , N . C . , March 16 . Battle of Bentonville March 19 – 21 . Occupation of Goldsboro March 24 . Advance on Raleigh April 10 – 14 . Occupation of Raleigh April 14 . Bennett ' s House April 26 . Surrender of Johnston and his army . March to Washington , D . C . , via Richmond , Va . , April 29 - May 19 . Grand Review May 24 . Casualties . The regiment lost a total of 349 men during service ; 9 officers and 92 enlisted men killed or mortally wounded , 2 officers and 246 enlisted men died of disease .