2nd Ohio Heavy Artillery Regiment was an artillery regiment that served in the Union Army during the American Civil War. Service The 2nd Ohio Heavy Artillery Regiment was organized at Camp Dennison near Cincinnati, Ohio and Covington, Kentucky. Companies were mustered in for three years service under the command of Colonel Horatio Gates Gibson. Company A mustered on 20 July 1863; Company B mustered on 5 August 1863; Company C mustered on 26 August 1863; Companies D, H, I, K, and L mustered on 7 September 1863; Companies E and M mustered on 9 September 1863; Company G mustered on 19 September 1863; and Company F mustered on 23 September 1863. The regiment served by detachments until May 1864. It was attached to District of Kentucky, Department of the Ohio, to May 1864. Cleveland, Tennessee, Department of the Ohio, to October 1864. 2nd Brigade, 4th Division, XXIII Corps, Department of the Ohio, to February 1864. 2nd Brigade, 4th Division, District of East Tennessee, Department of the Cumberland, to March 1865. 1st Brigade, 4th Division, District of East Tennessee, to August 1865. The 2nd Ohio Heavy Artillery mustered out 23 August 1865. Detailed service Company A moved to Covington, Ky. 19 August 1863, then to Fort Jones, Muldraugh's Hill, Ky. 11 October, and duty there until 10 January 1864. At Fort DeWolf, near Shepherdsville, until May. Moved to Cleveland, Tenn., 24 May. Company B moved to Covington Barracks 19 August, then to Bowling Green, Ky., 5 September, and duty there until 26 May 1864. Moved to Charleston, Tenn., 26 May. Company D moved to Muldraugh's Hill, Ky., and duty at Fort Saunders until 26 May 1864. Garrison at Tyner's Station until 9 October 1864, then joined Regiment at Loudoun, Tenn. Company E moved to Muldraugh's Hill and garrison Fort Boyle until 26 May 1864. Moved to Cleveland, Tenn., 26 May 1864. Company F moved to Bowling Green, Ky., and duty there until 26 May 1864. Moved to Charleston, Tenn., 26 May. Company G on duty at Bowling Green until 26 May 1864. Moved to Charleston, Tenn., 26 May. Company H moved to Munfordville, Ky. 11 October 1863, and garrison duty at Battery McConnell until 26 May 1864. Moved to Cleveland, Tenn., 26 May. Company I moved to Shepherdsville and duty at Fort DeWolf until 10 January 1864, and at Fort Nelson until 26 May. Moved to Cleveland 26 May 1864. Company