The 18th Missouri Infantry was a United States Army unit organized during the American Civil War.
Organized at Laclede, Missouri, July to November, 1861. Attached to:
District of St. Louis, Department of Missouri, to March, 1862.
2nd Brigade, 6th Division, Army of the Tennessee, to July, 1862.
2nd Brigade, 6th Division, District of Corinth, Miss., to November, 1862.
2nd Brigade, 6th Division, District of Corinth, 13th Army Corps (Old), Dept. of the Tennessee, November, 1862.
3rd Brigade, District of Corinth, 13th Army Corps, to December, 1862.
3rd Brigade, District of Corinth, 17th Army Corps, to January, 1863.
3rd Brigade, District of Corinth, 16th Army Corps, to March, 1863.
3rd Brigade, 2nd Division, 16th Army Corps, to November, 1863.
Fuller's Brigade, 2nd Division, 16th Army Corps, to January, 1864.
3rd Brigade, 2nd Division, 16th Army Corps, to March, 1864.
1st Brigade, 4th Division, 16th Army Corps, to September, 1864.
1st Brigade, 1st Division, 17th Army Corps, to July, 1865.
Duty on Hannibal and St. Joseph Railroad during summer and fall of 1861.
At Weston, Missouri, until December, 1861.
Ordered from St. Louis, Missouri to Cairo, Illinois, December 22, 1861.
At Bird's Point, Missouri, until March, 1862.
Ordered to Pittsburg Landing, Tennessee.
Battle of Shiloh, Shiloh, Tennessee, April 6–7, 1862.
Advance on and Siege of Corinth, Corinth, Mississippi, April 29-May 30, 1862.
At Corinth and Bolivar until December, 1862.
Battle of Corinth October 3–4, 1862 (Cos. "A," "B," "C" and "E").
Pursuit to Ripley October 5–12, 1862 (Cos. "A," "B," "C" and "E").
On duty in District of Corinth guarding Railroad toward Bethel until June, 1863.
Affairs at Camp Sheldon February 8 and 10, 1863.
Operations in Northeast Mississippi June 13–22, 1863.
Skirmishes at New Albany June 19. Mud Creek June 20, 1863.
At Corinth until November, 1863.
March to Pulaski, Tennessee, November 2–12, 1863.
Duty there and guard duty on Railroad until April, 1864.
Veterans on furlough January and February, 1864.
Atlanta (Ga.) Campaign May 1-September 8, 1864.
Demonstrations on Resaca May 8–13, 1864.
Sugar Valley May 9, 1864.
Near Resaca May 13, 1864.
Battle of Resaca from May 14–15, 1864.
Advance on Dallas May 18–25, 1864.
Operations on line of Pumpkin Vine Creek and battles about Dallas, New Hope Church and Allatoona Hills May 25-June 5, 1864.
Operations about Marietta and against Kenesaw Mountain June 10-July 2, 1864.
Assault on Kenesaw June 27, 1864.
Nickajack Creek July 2–5.
Ruff's Mills July 3–4, 1864.
Chattahoochie River - July 6–17, 1864.
Battle of Atlanta during the Atlanta Campaign - July 22, 1864. Siege of Atlanta July 22-August 25, 1864.
Flank movement on Jonesboro August 25–30, 1864. Battle of Jonesboro from August 31-September 1, 1864.
Lovejoy Station September 2-September 6, 1864.
Operations against Hood in North Georgia and North Alabama September 29-November 3, 1864.
March to the sea, November 15-December 10, 1864.
Monteith Swamp December 9, 1864.
Siege of Savannah December 10–21, 1864.
Campaign of the Carolinas January to April, 1865.
Pocotaligo, South Carolina, January 14–16, 1865.
Reconnaissance to Salkehatchie River, January 25, 1865.
Skirmishes Rivers' and Broxton's Bridges, Salkehatchie River, February 2, 1865.
Battle of Rivers' Bridge, Salkehatchie River, February 3, 1865.
Binnaker's Bridge, South Edisto River, February 9, 1865.
North Edisto River February 12–13, 1865.
Columbia February 15–17, 1865.
Juniper Creek, near Cheraw, March 3, 1865.
Fayetteville, North Carolina, March 11, 1865.
Battle of Bentonville March 20–21, 1865.
Occupation of Goldsboro, Goldsboro, North Carolina, March 24, 1865.
Advance on Raleigh April 10–14. Occupation of Raleigh April 14, 1865.
Bennett's House April 26, 1865.
Surrender of General Johnston and his army.
March to Washington, D.C., via Richmond, Virginia, April 29-May 20, 1865.
Grand Review of the Armies on May 24, 1865.
Moved to Louisville, Kentucky, June, and duty there until July. Mustered out July 18, 1865.
Regiment lost during service 6 Officers and 75 Enlisted men killed and mortally wounded and 164 Enlisted men by disease. Total 245.
