18th Ohio Infantry The 18th Ohio Volunteer Infantry ( or 18th OVI ) was an infantry regiment in the Union Army during the American Civil War . Service . Three - months regiment . Companies A , C , and E enrolled at Ironton , Ohio on April 22 , 1861 . Company B enrolled at Marietta , Ohio on April 27 , 1861 . Company D enrolled at McArthur , Ohio on April 18 , 1861 . Company F enrolled at Gallipolis , Ohio on April 22 , 1861 . Company I enrolled at Jackson , Ohio on April 24 . And Company K enrolled at Beverly , Ohio on April 23 , 1861 . The 18th Ohio Infantry organized at Parkersburg , Virginia and mustered in May 29 , 1861 under Colonel Timothy Robbins Stanley in response to President Lincoln ' s call for 75 , 000 volunteers . Companies were sent to different points on the Baltimore & Ohio Railroad to guard the railroad and trains between Parkersburg and Clarksburg , West Virginia ( then Virginia ) , until August . The regiment mustered out at Columbus , Ohio on August 28 , 1861 . Three - years regiment . The 18th Ohio Infantry was reorganized in Athens , Ohio , August 16 - September 28 , 1861 . The regiment moved to Camp Dennison near Cincinnati , Ohio and mustered in for three years service on November 4 , 1861 under the command of Colonel Timothy R . Stanley . The regiment was attached to 8th Brigade , Army of the Ohio to December 1861 . 8th Brigade , 3rd Division , Army of the Ohio , to July 1862 . Unattached , Railroad Guard , Army of the Ohio , to September 1862 . 29th Brigade , 8th Division , Army of the Ohio , to November 1862 . 2nd Brigade , 2nd Division , Center , XIV Corps , Army of the Cumberland , to January 1863 . 2nd Brigade , 2nd Division , XIV Corps , to October 1863 . 2nd Brigade , 1st Division , XIV Corps , to November 1863 . Engineer Brigade , Department of the Cumberland , to November 1864 . The 18th Ohio Infantry mustered out of service at Augusta , Georgia on November 9 , 1864 . Detailed service . Moved to Louisville , Ky . , November 6 , thence to Elizabethtown , Ky . , November 15 . Duty at Elizabethtown and Bacon Creek , Ky . , November 1861 to February 1862 . Advance on Bowling Green , Ky . , February 10 – 15 , and on Nashville , Tenn . , February 18 – 25 . Occupation of Nashville , Tenn . , February 25 - March 18 . Reconnaissance to Shelbyville , Tullahoma and McMinnville March 25 – 28 . To Fayetteville April 7 . Expedition to Huntsville , Ala . , April 10 – 11 . Capture of Huntsville April 11 . Advance on and capture of Decatur April 11 – 14 . Operations near Athens , Limestone Bridge , Mooresville and Elk River May 1 – 2 . Near Pulaski and near Bridgeport May 1 . Moved to Fayetteville May 31 . Negley ' s Expedition to Chattanooga June 1 – 15 . At Battle Creek until July 11 . Guard duty along Tennessee & Alabama Railroad from Tullahoma to McMinnville until September . Short Mountain Road and McMinnville August 29 ( Companies A and I ) . Retreat to Nashville , Tenn . Siege of Nashville September 12 - November 7 . Near Lavergne October 7 . Duty at Nashville until December 26 . Advance on Murfreesboro December 26 – 30 . Battle of Stones River December 30 – 31 , 1862 and January 1 – 3 , 1863 . Duty at Murfreesboro until June . Tullahoma Campaign June 23 - July 7 . Occupation of middle Tennessee until August 16 . Passage of Cumberland Mountains and Tennessee River and Chickamauga Campaign August 16 - September 22 . Davis Cross Roads or Dug Gap September 11 . Battle of Chickamauga September 19 21 . Rossville Gap September 21 . Siege of Chattanooga , Tenn . , September 24 - November 23 . Reopening Tennessee River October 26 – 29 . Brown ' s Ferry October 27 . Chattanooga - Ringgold Campaign November 23 – 27 . Orchard Knob November 23 – 24 . Missionary Ridge November 25 . Engaged in engineer duty at Chattanooga until October 20 , 1864 . Casualties . The regiment lost a total of 184 men during service ; 4 officers and 72 enlisted men killed or mortally wounded , 1 officer and 107 enlisted men died of disease .