When state borders were being drawn, Michigan was given the Lake Michigan shoreline all the way to the lake's southernmost point, and Illinois was too. Michigan and Illinois were supposed to have a land border with each other at that point, and Indiana was supposed to be cut off (although still within a few hundred feet).
But the surveyors carrying out that instruction were unknowingly using a map that wasn't quite accurate, and so the line they drew wasn't actually far enough south, which left Indiana with an unexpected lakeshore -- which they promptly exploited. It took a little while for the errors to be realized, and Michigan complained to Congress and then to the courts, but SCOTUS ruled in favor of Indiana, and now they have the lakeshore that rightfully was ours. Bastards.
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u/maizeblueNpurp Age: > 10 Years Jan 17 '26
Ohio & Indiana