1818
Events
Boone County
The county's second oldest town, Caledonia, is incorporated and renamed
Petersburg.
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Kentucky
U.S. & World
The U.S. and Canada agree that the 49th Parallel will serve as their common border.
Congress resolves that the American flag will have 13 red and white stripes and a blue field with a white star for each state.
Illinois becomes the 21st state.