|Unit Name:||140th Regiment Illinois Volunteer Infantry|
|Dates:||June 18, 1864 to October 29, 1864|
The 140th Regiment Illinois Volunteer Infantry was an infantry regiment that served in the Union Army during the American Civil War. It was among scores of regiments that were raised in the summer of 1864 as Hundred Days Men, an effort to augment existing manpower for an all-out push to end the war within 100 days.
The 140th Illinois Infantry was organized at Camp Butler, Illinois, and mustered into Federal service on June 18, 1864, for a one-hundred-day enlistment. The 140th served in garrisons in the Memphis, Tennessee, area.
The regiment suffered 5 enlisted men killed in action or mortally wounded, and 24 enlisted men who died of disease, for a total of 29 fatalities.