From Dyer's Compendium - 1st Regiment Heavy Artillery. Regiment organized at Portsmouth, Ohio, as the 117th Ohio Volunteer Infantry September 15, 1862. Ordered to Kentucky October 2. Attached to District of Eastern Kentucky, Dept. of the Ohio, October, 1862, to February, 1863. Covington, Ky., District Kentucky, Dept. Ohio, to August, 1863. Designation of Regiment changed to 1st Heavy Artillery May 2, 1863. District of North Central Kentucky, Dept. Ohio, to April, 1862. 2nd Brigade, 4th Division, 23rd Army Corps, Dept. of Ohio, to February, 1865. 1st Brigade, 4th Division, District of East Tennessee, Dept. of the Cumberland, to July, 1865.