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Illinois 12th Infantry (Union)

01/08/1861

Organized - Illinois 12th Infantry - Illinois

07/11/1861

Battle - Belmont - Belmont, Missouri

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Belmont

The Battle of Belmont was fought on November 7, 1861 in Missouri pitting Ulysses S Grant against Leonidas PolkREAD MORE

11/02/1862

Leadership Change - Regiment - Lieutenant Colonel Augustus L. Chetlain

Lieutenant ColonelAugustus L. Chetlain

11/02/1862

Leadership Change - Brigade - Colonel John McArthur

11/02/1862

Battle - Fort Donelson - Fort Donelson, Tennessee

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Fort Donelson

Early in the war, Union commanders realized control of the major rivers would be the key to success in the Western Theater.READ MORE

06/04/1862

Leadership Change - Regiment - Captain James R. Hugunin, and Lieutenant Colonel Augustus L. Chetlain

CaptainJames R. Hugunin

Lieutenant ColonelAugustus L. Chetlain

06/04/1862

Leadership Change - Brigade - Brigadier General John McArthur, and Colonel Thomas Morton

Brigadier GeneralJohn McArthur

ColonelThomas Morton

06/04/1862

Leadership Change - Brigade - Brigadier General John McArthur

Brigadier GeneralJohn McArthur

06/04/1862

Leadership Change - Division - Brigadier General W.H.L. Wallace

Brigadier GeneralW.H.L. Wallace

06/04/1862

Battle - Shiloh - Hardin County, Tennessee

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Shiloh

On the morning of April 6, 1862, 40,000 Confederate soldiers under the command of Gen. Albert Sidney Johnston poured out of the nearby woods and struck the encamped divisions of Union soldiers occupying ground near Pittsburg Landing on the Tennessee River.READ MORE

03/10/1862

Leadership Change - Regiment - Colonel Augustus L. Chetlain

03/10/1862

Leadership Change - Brigade - Brigadier General Richard J. Oglesby, and Colonel August Mersy

Brigadier GeneralRichard J. Oglesby

ColonelAugust Mersy

03/10/1862

Leadership Change - Brigade - Brigadier General Richard J. Oglesby

Brigadier GeneralRichard J. Oglesby

03/10/1862

Battle - Battle of Corinth - Corinth, Mississippi

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Battle of Corinth

Not to be confused with Siege of Corinth. Also known as Second Battle of Corinth.READ MORE

13/05/1864

Battle - Resaca - Gordon County, Georgia; Whitfield County, Georgia

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Resaca

Following his withdrawal from Rocky Face Ridge, the first battle in Maj. Gen. William T. Sherman's campaign against Atlanta, Confederate Gen. Joseph E. Johnston established a four-mile defensive position protecting the Western & Atlantic Railroad west and north of Resaca, where the railroad crossed the Oostanaula River. On May 13th, Sherman tested the Rebel lines, sending forward divisions to skirmish with the Confederates, with little substantive result. On the 14th, the fighting erupted into a full-…READ MORE

22/07/1864

Battle - Atlanta - Fulton County, Georgia; DeKalb County, Georgia

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Atlanta

Despite the defeat at Peach Tree Creek, Confederate Lieut. Gen. John Bell Hood still had hopes of driving Maj. Gen. William T. Sherman's Yankees from the outskirts of Atlanta with an offensive blow. On the night of July 21, 1864, Hood ordered Lt. Gen. William J. Hardee's corps to make 15-mile night march and assault the Union left flank east of the city, held by Maj. Gen. James B. McPherson's Army of the Tennessee. Joining the attack with Hardee would be the corps of Maj. Gen. Benjamin Cheatham. Hood attac…READ MORE

31/08/1864

Leadership Change - Brigade - Colonel Robert N. Adams

31/08/1864

Battle - Jonesborough - Clayton County, Georgia

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Jonesborough

By late August 1865, the city of Atlanta was not yet subdued by Maj. Gen. William T. Sherman's armies. A few supply lines remained open to the city supporting the army of Lieut. Gen. John B. Hood encircled there. Union cavalry raids inflicted only superficial damage, quickly repaired by the Confederates. Sherman determined that if he could destroy the Macon & Western and Atlanta & West Point Railroads to the south the Rebel army would be forced to evacuate the city. On August 25, Union infantry beg…READ MORE

19/03/1865

Battle - Bentonville - Bentonville, North Carolina

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Bentonville

After his march to the sea, Maj. Gen. William T. Sherman headed north in early 1865 to unite with Lt. Gen. Ulysses S. Grant's army in Virginia. Only Confederate Gen. Joseph Johnston's army stood between Sherman and Grant. After briefly blocking Sherman's advance at Averasboro, North Carolina on March 16, Johnston struck Maj. Gen. Henry Slocum's wing of Sherman's army near Bentonville on March 19. The Confederates ran into stiff resistance, as Slocum established a defensive position. Johnston's assaults con…READ MORE

18/07/1865

Mustered Out - Illinois 12th Infantry - Illinois

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