25th Ohio Infantry The 25th Ohio Volunteer Infantry ( or 25th OVI ) was an infantry regiment in the Union Army during the American Civil War . Service . The 25th Ohio Infantry was organized at Camp Chase in Columbus , Ohio and mustered in for three years service on June 28 , 1861 under the command of Colonel James A . Jones . On March 17 , 1862 , Company G was permanently detached and redesignated the 12th Ohio Battery . The regiment was attached to Cheat Mountain , District West Virginia , to November 1861 . Milroy ' s Command , Cheat Mountain , District West Virginia , to April 1862 . Milroy ' s Brigade , Department of the Mountains , to June 1862 . 2nd Brigade , 1st Division , I Corps , Army of Virginia , to September 1862 . 2nd Brigade , 1st Division , XI Corps , Army of the Potomac , to August 1863 . 2nd Brigade , Gordon ' s Division , Folly Island , South Carolina , X Corps , Department of the South , to January 1864 . District of Hilton Head , South Carolina , X Corps , Department of the South , to April 1864 . District of Hilton Head , South Carolina , Department of the South , to October 1864 . 3rd Separate Brigade , Department of the South , to November 1864 . 1st Brigade , Coast Division , Department of the South , to February 1865 . 3rd Separate Brigade , Hilton Head , South Carolina , Department of the South , to March 1865 . 1st Separate Brigade , District of Charleston , South Carolina , Department of the South , to August 1865 . 4th Separate Brigade , District of Western South Carolina , Department of the South , to January 1866 . Department of the South to June 1866 . The 25th Ohio Infantry mustered out of service on June 18 , 1866 . Detailed service . Ordered to western Virginia July 29 , and duty along the Baltimore & Ohio Railroad from Grafton to the Ohio River , until August 21 . Moved to Cheat Mountain Summit , Va . , August 21 , 1861 , and duty there August 25 - November 25 . Operations on Cheat Mountain September 11 – 17 . Action at Cheat Mountain September 12 . Greenbrier River October 3 – 4 . Duty at Huttonsville November 25 , 1861 to February 27 , 1862 . Expedition to Camp Baldwin December 11 – 13 , 1861 . Action at Camp Allegheny , Buffalo Mountain , December 12 . Expedition to Huntersville December 31 , 1861 to January 6 , 1862 . Duty at Beverly , Cheat Mountain , March . Expedition on the Seneca April 1 – 12 . Action at Monterey April 12 . At Staunton until May 7 . Battle of McDowell May 8 . March from Franklin to Strasburg May 26 - June 10 , pursuing Jackson up the Shenandoah Valley . Battle of Cross Keys June 8 . Duty at Sperryville and Centreville , Va . , until August . Battle of Cedar Mountain August 9 . Pope ' s Campaign in northern Virginia August 16 - September 2 . Freeman ' s Ford August 22 . Battle of Bull Run August 29 – 30 . Duty in the defenses of Washington , D . C . , until December . Expedition from Centreville to Bristoe September 25 – 28 . March to Fredericksburg , Va . , December 10 – 16 . " Mud March " January 20 – 24 , 1863 . At Brook ' s Station until April 27 . Chancellorsville Campaign April 27 - May 6 . Battle of Chancellorsville May 1 – 5 . Gettysburg Campaign June 11 - July 22 . Battle of Gettysburg , July 1 – 3 . Pursuit of Lee , to Manassas Gap , Va . , July 5 – 24 . At Warrenton Junction July 25 - August 6 . Moved to Folly Island , S . C . , August 6 – 12 . Duty at Folly and Morris Islands , S . C . , operating against Fort Sumter and Charleston until January 1864 . Duty at Hilton Head , S . C . , until November 23 , 1864 . ( Veterans absent on furlough January to March 1864 . Companies A , G , and I at Fort Pulaski , Ga . , September 25 to October 23 . ) Expedition against Charleston & Savannah Railroad November 28 – 30 . Battle of Honey Hill November 30 . Coosaw River December 4 . Demonstration on Charleston & Savannah Railroad December 6 – 9 . Deveaux ' s Neck December 6 . Occupation of Charleston February 26 , 1865 . Expedition toward Santee River February 28 - March 10 . Camp at Mt . Pleasant March 12 - April 3 . Potter ' s Expedition to Camden , S . C . , April 5 – 25 . Dingle ' s Mills April 9 . Statesburg April 15 . Occupation of Camden April 17 . Boykins ' Mills April 18 . Denkins ' Mills and Beach Creek near Statesburg April 19 . Return to Mt . Pleasant April 28 , then moved to Charleston May 6 and to Columbia May 7 , and garrison duty there until May 25 . Duty in Fairfield , Newberry , Edgefield , Lexington and Richland Counties until April 1866 . At Summerville until May and duty on the Sea Islands until June . Ordered to Tod ' s Barracks , Ohio , June 6 . Casualties . The regiment lost a total of 280 men during service ; 7 officers and 151 enlisted men killed or mortally wounded , 3 officers and 119 enlisted men died of disease .