The Territory of Illinois was established February 3, 1809. Admitted as the 21st state, Illinois achieved statehood on December 3, 1818. (Britannica)

See also:

Related Subjects

Related subjects

The graph displays the other subjects mentioned on the same pages as the subject "Illinois". If the same subject occurs on a page with "Illinois" more than once, it appears closer to "Illinois" on the graph, and is colored in a darker shade. The closer a subject is to the center, the more "related" the subjects are.