The Toledo War (1835–36), also known as the Michigan–Ohio War or the Ohio–Michigan War, was a boundary dispute between the U.S. state of Ohio and the adjoining territory of Michigan over what is now known as the Toledo Strip. Control of the mouth of the Maumee River and the inland shipping opportunities it represented, and the good farmland to the west were seen by both parties as valuable economic assets.
Poor geographical understanding of the Great Lakes helped produce conflicting state and federal legislation between 1787 and 1805, and varying interpretations of the laws led the governments of Ohio and Michigan to both claim jurisdiction over a 468-square-mile (1,210 km2) region along their border. The situation came to a head when Michigan petitioned for statehood in 1835 and sought to include the disputed territory within its boundaries. Both sides passed legislation attempting to force the other side's capitulation, and Ohio's Governor Robert Lucas and Michigan's 24-year-old "Boy Governor" Stevens T. Mason helped institute criminal penalties for residents submitting to the other's authority. Both states...