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.

Organized at Indianapolis, Ind.
August 16 Mustered in
August 17 Left State for St. Louis, Mo.
September March 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
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
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 –
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
January 1 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 March to 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
January 6-20 Moved to Baltimore, Md., thence 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 Mustered out