99th Illinois Infantry Regiment

99th Illinois Volunteer Infantry Monument at Vicksburg National Military Park across the ravine from the Railroad Redoubt (2019)
99th Regiment Illinois Volunteer Infantry
Former Illinoisan state flag
ActiveAugust 23, 1862 (1862-08-23) – August 9, 1865 (1865-08-09)
Country United States
AllegianceUnion
TypeInfantry
EngagementsAmerican Civil War
Captain Isaac G. Hodgen of Co. A, 99th Illinois Infantry Regiment. From the Liljenquist Family Collection of Civil War Photographs, Prints and Photographs Division, Library of Congress

The 99th Regiment Illinois Volunteer Infantry was an infantry regiment that served in the Union Army during the American Civil War.