Organized in Ohio at large, under authority granted by Gen. Fremont, as Morton's Independent Rifle Regiment. Accepted by State September, 1861. Duty at Benton Barracks, Mo., till September 24, 1861. Moved to Franklin, Mo., September 24, thence to Harman, Mo., September 27, and duty there till December 20. Attached to Dept. of Missouri to March, 1862. 2nd Brigade, 2nd Division, Army of the Tennessee, to July, 1862. 2nd Brigade, 2nd Division, District of Corinth, Miss., to September, 1862. 1st Brigade, 2nd Division, District of Corinth, Miss., to November, 1862. 2nd Brigade. District of Corinth, Miss., 13th Army Corps (Old), Dept. of the Tennessee, to December, 1862. 2nd Brigade, District of Corinth, 17th Army Corps, to January, 1863. 2nd Brigade, District of Corinth, 16th Army Corps, to March, 1863. 2nd Brigade, 2nd Division, 16th Army Corps, to September, 1864. 2nd Brigade, 4th Division, 15th Army Corps, to July, 1865.