18th Illinois Infantry Regiment

18th Regiment Illinois Volunteer Infantry
Illinois state flag
ActiveMay 28, 1861, to December 31, 1865
CountryUnited States
AllegianceUnion
BranchInfantry
EngagementsFort Henry
Fort Donelson
Battle of Shiloh
Siege of Vicksburg

The 18th Regiment Illinois Volunteer Infantry was an infantry regiment that served in the Union Army during the American Civil War.