133rd Illinois Infantry Regiment

133rd Regiment Illinois Volunteer Infantry
Illinois state flag
ActiveMay 31, 1864, to September 24, 1864
CountryUnited States
AllegianceUnion
BranchInfantry

The 133rd 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.