The 33d Infantry Division was a formation of the U.S. Army National Guard between 1917 and 1968. Originally formed for service during World War I, the division fought along the Western Front at Le Hamel, in the Meuse-Argonne Offensive, on the Somme and around St. Mihiel. It was re-formed in the inter-war years, and then later activated for service during World War II, seeing action against the Japanese in the Pacific. In the post war era, the division was reconstituted as an all-Illinois National Guard division. In the late 1960s, the division was reduced to brigade-sized formation, and is currently perpetuated by the 33rd Infantry Brigade Combat Team.