The 28th Illinois Infantry was organized at Camp Butler, Illinois (dubbed "Camp Misery" because of overcrowding and poor conditions[2]) seven miles (11 km) northeast of Springfield, Illinois, which had just been opened as a training camp for Illinois soldiers, and was mustered into Federal service on August 15, 1861. Between that date and March 15, 1866, when the regiment was mustered out and then discharged at Camp Butler on May 13, 1866, 290 fatalities were recorded, 184 of them from disease and 106 killed and mortally wounded.[3]
Vicksburg's surrender was followed by the campaign against the Confederacy's 4th largest city, Mobile, Alabama, which fell after the siege and capture of Spanish Fort and the Battle of Fort Blakeley (February 17—April 12, 1865). The 28th Illinois Infantry completed later assignments with the occupation of Brazos Santiago, Clarksville, and Brownsville, Texas (July, 1865—March, 1866).