Illinois 100th Volunteer Infantry (Union)
1862-08-30
Organized - Illinois 100th Volunteer Infantry - Illinois
1862-10-08
Battle - Perryville - Perryville, Kentucky
On October 7, 1862, Maj. Gen. Don Carlos Buell's Army of the Ohio, in pursuit of Gen Braxton Bragg's Army of Mississippi, approached the crossroads town of Perryville, Kentucky. Union forces skirmished with Confederates on the Springfield Pike before heavy fighting began on Peters Hill. The next day, fighting continued as a Union division advanced up the pike. After noon, a Confederate division struck the Union left flank and forced it to fall back. When more Confederates joined the fray, the Union line ma…READ MORE
1862-12-31
Leadership Change - Regiment - Colonel Frederick A. Bartleson
ColonelFrederick A. Bartleson
1862-12-31
Leadership Change - Brigade - Brigadier General Milo S. Hascall, and Colonel George P. Buell
Brigadier GeneralMilo S. Hascall
ColonelGeorge P. Buell
1862-12-31
Leadership Change - Division - Brigadier General Milo S. Hascall, and Brigadier General Thomas J. Wood
Brigadier GeneralMilo S. Hascall
Brigadier GeneralThomas J. Wood
1862-12-31
Leadership Change - Division - Brigadier General Thomas J. Wood
Brigadier GeneralThomas J. Wood
1862-12-31
Battle - Stones River - Murfreesboro, Tennessee
After his October 1862 defeat at Perryville in Kentucky, Gen. Braxton Bragg withdrew his army into middle Tennessee and resupplied his men near Murfreesboro.READ MORE
1863-09-19
Leadership Change - Regiment - Colonel Frederick A. Bartleson, and Major Charles M. Hammond
ColonelFrederick A. Bartleson
MajorCharles M. Hammond
1863-09-19
Leadership Change - Brigade - Colonel George P. Buell
ColonelGeorge P. Buell
1863-09-19
Leadership Change - Division - Brigadier General Thomas J. Wood
Brigadier GeneralThomas J. Wood
1863-09-19
Leadership Change - Regiment - Colonel Frederick A. Bartleson
ColonelFrederick A. Bartleson
1863-09-19
Battle - Chickamauga - Catoosa County, Georgia; Walker County, Georgia
After the successful Tullahoma Campaign, Maj. Gen. William Rosecrans continued the Union offensive, aiming to force Gen. Braxton Bragg's Confederate army out of Chattanooga. Through a series of skillful marches towards the Confederate-held city, Rosecrans forced Bragg out of Chattanooga and into Georgia. Determined to reoccupy the city, Bragg followed the Federals north, brushing with Rosecrans' army at Davis' Cross Roads. While they marched on September 18th, his cavalry and infantry skirmished with Un…READ MORE
1863-11-25
Battle - Missionary Ridge - Chattanooga, Tennessee
From the last days of September through October 1863, Gen. Braxton Bragg's army laid siege to the Union army under Maj. Gen. William Rosecrans at Chattanooga, cutting off its supplies. On October 17, Maj. Gen. Ulysses S. Grant received command of the Western armies; he moved to reinforce Chattanooga and replaced Rosecrans with Maj. Gen. George Thomas. A new supply line was soon established. Maj. Gen. William T. Sherman arrived with his four divisions in mid-November, and the Federals began offensive operat…READ MORE
1864-05-07
Battle - Rocky Face Ridge - Whitfield County, Georgia
During early May 1864, Maj. Gen. William T. Sherman would successfully outmaneuver the army of Gen. Joseph E. Johnston in multiple battles in northwest Georgia. Each time, Johnston would fall back to a new defensive position closer to the strategic Confederate city of Atlanta. By May 7th, Johnston had entrenched his army on the long, high mountain of Rocky Face Ridge and eastward across Crow Valley. As Sherman approached, he decided to demonstrate against the position with two columns to the north while he…READ MORE
1864-05-26
Leadership Change - Brigade - Colonel Reuben Williams
ColonelReuben Williams
1864-05-26
Leadership Change - Division - Brigadier General William Harrow
Brigadier GeneralWilliam Harrow
1864-05-27
Battle - Dallas - Paulding County, Georgia
During early and mid-May 1864, Maj. Gen. William T. Sherman successfully outmaneuvered the army of Gen. Joseph E. Johnston in multiple battles in northwest Georgia. Each time, Johnston fell back to a new defensive position closer to the strategic Confederate city of Atlanta. Stopped at New Hope Church on Johnston's left on May 26th, Sherman attacked Johnston's right at Pickett's Mill on May 27th. The next day, Lt. Gen. William J. Hardee's corps probed the Union defensive line, held by Maj. Gen. John A. Log…READ MORE
1864-06-27
Battle - Kennesaw Mountain - Cobb County, Georgia
Fearing envelopment northwest of Atlanta, Confederate Gen. Joseph E. Johnston withdrew his army to a new defensive position astride Kennesaw Mountain near Marietta. Johnston selected this position in order to protect the Western & Atlantic Railroad, his supply link to Atlanta. Prior to taking up this new line on June 19th, Johnston had pioneers working through the night digging trenches and erecting fortifications, turning Kennesaw into a formidable earthen fortress. Having defeated Lieut. Gen. John…READ MORE
1864-07-20
Leadership Change - Brigade - Colonel John W. Blake
ColonelJohn W. Blake
1864-07-20
Leadership Change - Division - Brigadier General John Newton
Brigadier GeneralJohn Newton
1864-07-20
Battle - Peachtree Creek - Fulton County, Georgia
Weary of Gen. Joseph E. Johnston's pattern of retreat through northwest Georgia in the face of Maj. Gen. William T. Sherman's advancing armies, President Jefferson Davis removed him from command of the Army of Tennessee, replacing him with Lieut. Gen. John B. Hood. On July 20th, Hood determined to take the fight to the enemy by setting upon an isolated portion of Sherman's forces in front of Atlanta. Hood's target would be the Union corps of Maj. Gens. Oliver O. Howard and Joseph Hooker from Maj. Gen. Geo…READ MORE
1864-07-22
Leadership Change - Brigade - Colonel Reuben Williams
ColonelReuben Williams
1864-07-22
Leadership Change - Division - Brigadier General William Harrow
Brigadier GeneralWilliam Harrow
1864-07-22
Battle - Atlanta - Fulton County, Georgia; DeKalb County, Georgia
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
1864-08-31
Leadership Change - Brigade - Brigadier General George D. Wagner
Brigadier GeneralGeorge D. Wagner
1864-08-31
Leadership Change - Division - Brigadier General John Newton
Brigadier GeneralJohn Newton
1864-08-31
Battle - Jonesborough - Clayton County, Georgia
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
1864-11-30
Leadership Change - Regiment - Lieutenant Colonel Charles M. Hammond
Lieutenant ColonelCharles M. Hammond
1864-11-30
Leadership Change - Brigade - Colonel John Q. Lane
ColonelJohn Q. Lane
1864-11-30
Leadership Change - Division - Brigadier General George D. Wagner
Brigadier GeneralGeorge D. Wagner
1864-11-30
Battle - Franklin (1864) - Franklin, Tennessee
After allowing Maj. Gen. John Schofield's Army of the Ohio to pass him near Spring Hill, Tennessee, the previous morning, Lt. Gen. John Bell Hood led his 30,000-man Army of Tennessee to the outskirts of Franklin on November 30th. Schofield's army had constructed a strong defensive line south of the town. Hood took a position two miles south of Schofield, with open, rolling farm land between them, and prepared to attack. At 4:00 p.m., over 20,000 Confederates moved forward east and west of the Columbia Pike…READ MORE
1864-12-15
Leadership Change - Regiment - Lieutenant Colonel Charles M.Hammend
Lieutenant ColonelCharles M.Hammend
1864-12-15
Leadership Change - Division - Brigadier General Washington Lafayette Elliott
Brigadier GeneralWashington Lafayette Elliott
1864-12-15
Battle - Nashville - Nashville, Tennessee
Despite a series of defeats in the closing days of November, 1864, Confederate Lieut. Gen. John Bell Hood continued to drag his bloodied Army of Tennessee, approximately 30,000 strong, north towards Nashville. The city was protected by 55,000 Union soldiers, which should have precluded further offensive operations, but Hood was determined and his situation was dire. Hood reached Nashville on December 2nd and staked out a position south of the city, hoping to draw the Union forces into a costly attack. Ulys…READ MORE
1865-06-15
Mustered Out - Illinois 100th Volunteer Infantry - Illinois
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