system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is the Upper Peninsula part of Michigan and not Wisconsin?

Is there any historical or cultural reason behind it?  Geographically, it doesn’t make any sense.
gpt
There was a border dispute in the early 1800s, ~~before either of them were states~~, between Ohio and Michigan, over a strip of land that includes Toledo, a port town at the western end of Lake Erie. The land was ultimately awarded to Ohio, and, to make it up to the Michigan authorities, they were assigned the UP. Wisconsin was not settled or organized enough to be a player at this stage.

Edit: got the chronology wrong.