History
The Adena and Hopewell peoples raised earthworks across Ohio, and the Mississippian city at Cahokia in Illinois was the largest pre-Columbian settlement north of Mexico. At European contact the region was home to the Anishinaabe peoples — Ojibwe, Odawa and Potawatomi — the Ho-Chunk, Menominee, Dakota, Miami, Shawnee and others. French explorers and fur traders arrived in the 17th century; Jacques Marquette and Louis Jolliet travelled the upper Mississippi in 1673, and Antoine de la Mothe Cadillac founded Detroit in 1701.
Britain took the area in 1763, and after independence it became the Northwest Territory, where the Northwest Ordinance of 1787 banned slavery. Native nations resisted American expansion in a series of wars, including Tecumseh's confederacy in the War of 1812; treaties then stripped them of most of their land, and after the Dakota War of 1862 in Minnesota, 38 Dakota men were hanged at Mankato, the largest mass execution in US history. Ohio was a key route on the Underground Railroad, and Illinois sent Abraham Lincoln from Springfield to the White House.
Canals and railways turned Chicago from a small settlement in the 1830s into a giant of meatpacking, grain and steel; it rebuilt after the Great Fire of 1871 and hosted the World's Columbian Exposition in 1893. Henry Ford's moving assembly line made Detroit the car capital of the world, while Cleveland, Akron, Gary, Milwaukee and Minneapolis grew on oil, tyres, steel, beer and flour. The Great Migration brought Black southerners north. From the 1970s factory closures created the Rust Belt, and Detroit filed for bankruptcy in 2013. In 2020 the murder of George Floyd by a police officer in Minneapolis set off protests across the country and beyond.
