15th Indiana Infantry

Organized at Lafayette, Ind., for one year's service May, 1861. Reorganized for three years' service and mustered in June 14, 1861. Moved to Indianapolis, Ind., thence to Clarksburg, W. Va., July 1-6. West Virginia Campaign July 6-17. Attached to 1st Brigade, Army of Occupation, West Virginia, July to September, 1861. Reynolds' Cheat Mountain District, W. Va., to November, 1861. 15th Brigade, Army of the Ohio, to December, 1861. 15th Brigade, 4th Division, Army of the Ohio, to March, 1862. 15th Brigade, 6th Division, Army of the Ohio, March, 1862. 21st Brigade, 6th Division, Army of the Ohio, to September, 1862. 21st Brigade, 6th Division, 2nd Corps, Army of the Ohio, to November, 1862, 2nd Brigade, 1st Division, Left Wing 14th Army Corps, Army of the Cumberland, to January, 1863. 2nd Brigade, 1st Division, 21st Army Corps, Army of the Cumberland, to October, 1863. 2nd Brigade, 2nd Division, 4th Army Corps, Army of the Cumberland, to February, 1864. Garrison, Chattanooga, Tenn., Dept. of the Cumberland, to June, 1864.

SERVICE. – Duty in Elkwater Valley, W. Va., July to November, 1861. Operations on Cheat Mountain September 11-17. Elkwater September 11. Cheat Mountain Pass September 12. Greenbrier River October 3-4. Ordered to Louisville November 19. Duty at Bardstown and Lebanon, Ky., till February, 1862. March to Nashville, Tenn., February 17-March 13, and to Savannah, Tenn., March 21-April 6. Battle of Shiloh April 6-7. Advance on and siege of Corinth, Miss., April 29-May 30. Pursuit to Booneville May 30-June 12. Buell's Campaign in Northern Alabama and Middle Tennessee June to August. March to Louisville, Ky., in pursuit of Bragg August 21-September 26. Pursuit of Bragg into Kentucky October 1-22. Battle of Perryville, Ky., October 8 (Reserve). March to Nashville, Tenn., October 22-November 7, and duty there till December 26. Lavergne December 11. Advance on Murfreesboro December 26-30. Battle of Stone's River December 30-31, 1862, and January 1-3, 1863. Duty at Murfreesboro till June. Reconnoissance to Nolensville and Versailles January 13-15. Middle Tennessee or Tullahoma Campaign June 23-July 7. Camp at Pelham till August 17. Passage of the Cumberland Mountains and Tennessee River and Chickamauga (Ga.) Campaign August 17-September 22. Occupation of Chattanooga September 9, and assigned to duty there as garrison. Siege of Chattanooga, Tenn., September 24-November 23. Chattanooga-Ringgold Campaign November 23-27. Orchard Knob November 23-24. Mission Ridge November 25. Pursuit to Graysville November 26-27. March to relief of Knoxville, Tenn., November 28-December 8. Duty at Knoxville and vicinity till February, 1864. Ordered to Chattanooga, Tenn., and garrison duty there till June. Mustered out June 16, 1864 (expiration of term). Veterans and Recruits transferred to 17th Indiana Infantry.

Regiment lost during service 4 Officers and 103 Enlisted men killed and mortally wounded and 76 Enlisted men by disease. Total 183.

SOURCE: Frederick H. Dyer, A Compendium of the War of the 3, p. Rebellion, Part 1124