15th Regiment, Missouri Infantry (Union)

Organized at St. Louis, Mo., August and September, 1861. Moved to Jefferson City, Mo., September, 1861. Attached to Fremont's Army of the West to January, 1862. 5th Brigade, Army of Southwest Missouri, to March, 1862. 1st Brigade, 2nd Division, Army of Southwest Missouri, to May, 1862. 1st Brigade, 5th Division, Army of Mississippi, to September, 1862. 35th Brigade, 11th Division, Army of Ohio, to October, 1862. 35th Brigade, 11th Division, 3rd Army Corps, Army of Ohio, to November, 1862. 2nd Brigade, 3rd Division, Right Wing 14th Army Corps, Army of the Cumberland, to January, 1863. 2nd Brigade, 3rd Division, 20th Army Corps, Army of the Cumberland, to October, 1863. 1st Brigade, 2nd Division, 4th Army Corps, to April, 1864. 3rd Brigade, 2nd Division, 4th Army Corps, to June, 1865. 2nd Brigade, 2nd Division, 4th Army Corps, to August, 1865. Dept. of Texas to December, 1865.