Slavery in what became the U.S. state of Illinois existed for more than a century. Illinois did not become a state until 1818, but earlier regional systems of government had already established slavery. France introduced African slavery to the Illinois Country in the early eighteenth century. French and other inhabitants of Illinois continued the practice of owning slaves throughout the Illinois Country's period of British rule (1763-1783), as well as after its transfer to the new United States in 1783 as Illinois County, Virginia. The Northwest Ordinance (1787) banned slavery in Illinois and the rest of the Northwest Territory. Nonetheless, slavery remained a contentious issue, through the period when Illinois was part of the Indiana Territory and the Illinois Territory and some slaves re