United States Regiments & Batteries > Indiana
The 18th Indiana Infantry Regiment lost 5 officers and 68 enlisted men killed or mortally wounded and 1 officer and 130 enlisted men to disease during the Civil War.
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1861
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| Organized at Indianapolis, Ind. | |
| August 16 | The 18th Indiana Infantry Regiment mustered in at Indianapolis |
| August 17 | The regiment left the Indiana by rail for St. Louis, Mo. |
| September | Marched to relief of Colonel Mulligan at Lexington, Mo. Attached to Fremont’s Army of the West and Dept. of Missouri |
| September 19 | Action at Glasgow Mountain |
| September 22-October 15 | Fremont’s advance on Springfield, Mo. |
| November | March to Otterville, Mo. |
| December 15-19 | Expedition to Milford |
| December 18 | Action at Shawnee Mound or Milford on the Blackwater, and capture of 1,300 prisoners |
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1862
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| January | Attached to 1st Brigade, 3rd Division, Army of Southwest Missouri |
| January 25-February 14 | Advance on Springfield, Mo. |
| February | Pursuit of Price to Cassville, Ark. |
| March 6-8 | Battle of Pea Ridge, Ark. |
| March | At Sulphur Rock |
| May | Attached to 1st Division, Army of Southwest Missouri |
| May 25-July 14 | March to Batesville, then to Helena, Ark. |
| July | Duty at Helena attached to District of Eastern Arkansas, Dept. of Missouri |
| October | Ordered to Pilot Knob, Mo., and operations in Southeast Missouri attached to 2nd Brigade, 1st Division, District of Southeast Missouri, Dept. of Missouri |
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1863
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| March 5 | Moved to Helena, Ark. then to Milliken’s Bend, La. Attached to 1st Brigade, 14th Division, 13th Army Corps, Army of the Tennessee |
| April 25-30 | Movement on Bruinsburg and turning Grand Gulf |
| May 1 |
Battle of Port Gibson |
| May 16 |
Battle of Champion’s Hill |
| May 17 | Big Black River Bridge |
| May 18-July 4 |
Siege of Vicksburg, Miss. |
| May 19 and 22 |
Assaults on Vicksburg |
| July 4-10 | Advance on Jackson, Miss. attached to 1st Brigade, 1st Division, 13th Army Corps, Army of the Tennessee |
| July 10-17 |
Siege of Jackson |
| July-August | Duty at Vicksburg |
| August 20 | Ordered to New Orleans, La. |
| August – September |
Duty at Carrollton, Brashear City and Berwick attached to Dept. of the Gulf |
| October 3-November 8 |
Western Louisiana Campaign |
| November 8 | Moved to New Orleans |
| November 12 | To Texas |
| November 17 | Capture of Mustang Island |
| November 27-30 | Fort Esperanza |
| December | Duty at Mustang Island and Indianola |
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1864
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| January 1 | The regiment reenlisted |
| March 8-May 3 | Near Baton Rouge, La. |
| June 4 | Veteran furlough and duty in Indiana |
| July 16 | Moved to Bermuda Hundred, Va. and attached to 3rd Brigade, 2nd Division, 19th Army Corps |
| August 5 | To Washington, D.C. |
| August 10-19 | Marched to the Shenandoah Valley. Attached to 4th Brigade, 2nd Division, 19th Army Corps, Army of the Shenandoah Middle Military Division |
| August to November |
Sheridan’s Shenandoah Valley Campaign |
| September 19 |
Third Battle of Winchester (Opequan) |
| September 22 |
Fisher’s Hill |
| October 19 |
Battle of Cedar Creek |
| October | Duty in the Shenandoah Valley |
| December | Attached to 1st Brigade, 2nd Division, 19th Army Corps |
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1865
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| January 6-20 | Moved to Baltimore, Md., then to Savannah, Ga. and attached to 1st Brigade, Grover’s Division, District of Savannah, Ga., Dept. of the South |
| May 3 | At Augusta, Ga. |
| June 7 | Provost duty in Southern Georgia |
| August 28 | The 18th Indiana Infantry Regiment mustered out |