Organized at Decatur, Ill., July 3, 1861, and accepted by the Secretary of War as G. A. Smith's Independent Regiment July 23, 1861. Moved to Jefferson Barracks, Mo., August 4-5. Mustered in at St. Louis, Mo., August 28, 1861. Moved to Jefferson City, Mo., September 15, thence to Otterville September 25, and to Sedalia October 15. Fremont's Campaign against Springfield, Mo., October 15-November 8. Attached to Dept. of Missouri to January, 1862. 1st Brigade, Army of Southwest Missouri, to March, 1862. 1st Brigade, 4th Division, Army of the Southwest Missouri, to June, 1862. 1st Brigade, 4th Division, Army of Mississippi, to September, 1862. 32nd Brigade, 9th Division, Army of the Ohio, to October, 1862. 32nd Brigade, 9th Division, 3rd Army Corps, Army Ohio, to November, 1862. 3rd Brigade, 1st Division, Right Wing 14th Army Corps, Army of the Cumberland, to January, 1863. 3rd Brigade, 1st Division, 20th Army Corps, Army of the Cumberland, to October, 1863. 1st Brigade, 3rd Division, 4th Army Corps, to September, 1864.
SERVICE - Moved from Springfield to Rolla, Mo., November 13-19, 1861, and duty there till January, 1862. Curtis' Campaign in Missouri and Arkansas. Advance on Springfield, Mo. and pursuit of Price to Cross Hollows, Ark., January 23-February 21. Battles of Pea Ridge March 6-8. March to Batesville, Ark., April 5-May 8. March to Cape Girardeau, Mo., May 10-21, thence moved to Hamburg Landing, Tenn., May 22-25. Advance on and siege of Corinth, Miss., May 27-30. Pursuit to Booneville May 31-June 12. March to Jacinto June 21-22, thence to Holly Springs June 27-29. At Jacinto till August 8. Guard Bear Creek Bridge till August 21. March to Nashville, Tenn., August 21-September 1, thence to Louisville, Ky., in pursuit of Bragg, September 2-26. Pursuit of Bragg into Kentucky October 1-15. Near Perryville October 6-7. Chaplin Hills, Perryville October 8. March to Nashville, Tenn., October 17-November 7 and duty there till December 26. Expedition from Edgefield to Harpeth Shoals and Clarksville November 26-December 1. Advance on Murfreesboro December 26-30. Nolensville Knob Gap December 26. Battle of Stone River December 30-31, 1862, and January 1-3, 1863. Duty at Murfreesboro till June. Scout to Franklin January 31-February 12. Reconnoissance to Salem and Versailles March 9-14. Operations on Edgeville Pike June 4; Middle Tennessee or Tullahoma Campaign June 24-July 7; Liberty Gap June 24-27. Occupation of Middle Tennessee till August 16. Passage of Cumberland Mountains and Tennessee River and Chickamauga (Ga.) Campaign August 16-September 22. Battle of Chickamauga, Ga., September 19-20. Siege of Chattanooga, Tenn., September 24-November 23. Chattanooga-Ringgold Campaign November 23-27. Orchard Knob November 23-24. Mission Ridge November 25. March to relief of Knoxville, Tenn., November 28-December 8. Operations in East Tennessee till January, 1864. At Loudon, Tenn., January 22-April 13. Atlanta (Ga.) Campaign May 1-August 26. Demonstration on Rocky Faced Ridge May 8-11. Buzzard's Roost Gap May 8-9. Demonstrations on Dalton May 9-13. Battle of Resaca May 14-15. Adairsville May 17. Near Kingston May 18-19. Near Cassville May 19. Advance on Dallas May 23-25. Operations on line of Pumpkin Vine Creek and battles about Dallas, New Hope Church and Allatoona Hills May 25-June 5. Pickett's Mills May 27. Operations about Marietta and against Kenesaw Mountain June 10-July 2; Pine Hill June 11-14; Lost Mountain June 15-17. Assault on Kenesaw June 27. Ruff's Station, Smyrna Camp Ground, July 4. Chattahoochie River July 5-17. Peach Tree Creek July 19-20. Siege of Atlanta July 22-August 25. Moved to Chattanooga, Tenn., August 26-27, thence to Springfield, Ill., August 31.
Mustered out September 27, 1864, expiration of term,
Regiment lost during service 7 Officers and 91 Enlisted men killed and mortally wounded and 5 Officers and 164 Enlisted men by disease. Total 267.