Organized at Paola by consolidation of 3rd and 4th Kansas Infantry April 3, 1862. Attached to Dept. of Kansas to August, 1862. 2nd Brigade, Dept. of Kansas, to October, 1862. 2nd Brigade, 1st Division, Army of the Frontier, Dept. Missouri, to February, 1863. District of Rolla, Dept Missouri, to June, 1863. District of St. Louis, Mo., Dept. Missouri, to August, 1863. District of Kansas, Dept. of Missouri, to January, 1864. Alton, Ill., to August, 1864. District of St. Louis, Mo., Dept. Missouri, to November, 1864. Nashville, Tenn., Dept. of the Cumberland, to December, 1864. 2nd Brigade, 2nd Division (Detachment), Army Tennessee, to February, 1865. 2nd Brigade, 2nd Division, 16th Army Corps, Military Division West Mississippi, to August, 1865.
Moved to Fort Scott, Kan., April, 1862, and duty there till June 4. Companies on Expedition into Indian Territory with 2nd Ohio Cavalry June 13-August 15. Locust Grove, C. N., July 3. Reconnoissance from Grand River to Fort Gibson, Tahlequah and Park Hill, and skirmishes July 14-17. Campaign against Coffey and Cockrell in Missouri August. Jackson County, Mo., September 15. Newtonia September 30. Occupation of Newtonia October 4. Old Fort Wayne or Beattie's Prairie near Maysville October 22. Cane Hill October 28. Battle of Prairie Grove, Ark., December 7. Expedition over Boston Mountains to Van Buren December 27-31. Moved to Springfield, Mo., January, 1863, and duty there till February 27. Near Mount Vernon till March 15. Operations against Shelby till April. Moved to Rolla, Mo., April 27, thence to St. Louis, Mo., June 4-8. Moved to Indianapolis, Ind., and return to St. Louis July 18. Moved to Kansas City, Mo., August, and duty there till January, 1864. Skirmish with Quantrell at Paola August 21, 1863 (Detachment). Company "I" detached at St. Louis, Mo., as provost guard July and August, 1863, rejoining at Kansas City. Company "K" at Topeka, Kan., September to November, 1863. Regiment moved to St. Louis, Mo., January, 1864, thence to Alton, Ill., and guard Military Prison there till August, 1864. Non-Veterans moved to St Louis, Mo., and mustered out August 19-20, 1864. Veterans and Recruits consolidated to a Battalion of four Companies August 15, 1864. On duty at St. Louis, Mo., till October 20. Moved to Pilot Knob October 20-24, thence to Paducah, Ky., November 2-12, and to Nashville, Tenn., November 28-29. Temporarily attached to 4th Army Corps, Army of the Cumberland. Battle of Franklin November 30. Battle of Nashville December 15-16. Pursuit of Hood to the Tennessee River December 17-28. Moved to Eastport, Miss., January 4-7, 1865. Reconnoissance to Iuka, Miss., January 9. Moved to New Orleans, La., February 8-21. Campaign against Mobile, Ala., and its defences March 17-April 12. Siege of Spanish Fort and Fort Blakely March 26-April 8. Assault and capture of Fort Blakely April 9.
Occupation of Mobile April 12. March to Montgomery April 13-25. Duty there and in the District of Alabama till August. Mustered out August 30, 1865, and discharged at Fort Leavenworth, Kan., September 20, 1865.
Regiment lost during service 2 Officers and 26 Enlisted men killed and mortally wounded and 4 Officers and 114 Enlisted men by disease. Total 146.