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123rd Illinois Infantry
in the American Civil War

Online Books:
123rd Illinois Infantry Soldier Roster - Report of the Adjutant General of the State of Illinois, Volume 6, Revised by Brigadier General J.N. Reece, Adjutant General, 1900       View Entire Book

Regimental History
One Hundred and Twenty-third Illinois Infantry. Col., James Monroe; Lieut.-Col., Jonathan Biggs; Maj., James A. Connolly. This regiment was organized at Mattoon, Cos. A, C, D, H, I and K being from Coles county, B from Cumberland, E from Clark, F and G from Clark and Crawford. It was mustered into service at Camp Terry, Mattoon, Sept. 6, 1862. On Sept. 19 the regiment was loaded into freight cars at Mattoon and transported to Louisville, Ky., where it was at once put to work to fortify the city against Bragg who was then advancing on it. On Oct. 8, just 19 days after leaving Mattoon, the regiment was engaged in the battle of Perryville, where it lost 36 killed and 180 wounded. Early in March, 1863, it was attacked beyond Stone's river, while halted on Breed's hill with arms stacked and ranks broken by a large cavalry force, but forming under fire and repelling the attack, it waded Stone's river, carrying off its wounded, and withdrew to Murfreesboro. On March 20 the brigade, including the regiment, was attacked and surrounded by Morgan's cavalry, about 5000 strong, with 6 pieces of artillery, near Milton, Tenn., about 12 miles out from Murfreesboro, but the enemy was driven from the field, leaving his dead and wounded and 2 pieces of artillery. In the affair at Hoover's gap in June the regiment lost several in killed and wounded. In September it forded the river above Chattanooga and led the advance of Crittenden's corps to Ringgold and Tunnel Hill, Ga., constantly skirmishing during the three days' advance. It was engaged in the battle of Chickamauga, taking its place in line with the infantry of the 14th corps, to which it belonged. In October it engaged in the battle at Farmington, Tenn., in which Wheeler was severely punished and driven from the state. It participated throughout the entire Atlanta campaign and then returned northward in pursuit of Hood, continuing so engaged until Nov. 1, when it moved to Louisville, Ky. In the spring of 1865 the regiment participated in the "Wilson Raid" into Alabama and Georgia, and this marked the close of its career as an organization. It was mustered out at Edgefield, Tenn., June 27, 1865.

Regimental history taken from "The Union Army" by Federal Publishing Company, 1908 - Volume 3

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