 During the 18th century, Native Americans were victorious in 31 of the 37 recorded incidents with white settlers in the territory.The Congress of the Confederation formed the Northwest Territory under the terms of the Northwest Ordinance on July 13, 1787.This territory, which initially included land bounded by the Appalachian Mountains, the Mississippi River, the Great Lakes, and the Ohio River, was subsequently partitioned into the Indiana Territory (1800), Michigan Territory (1805), and the Illinois Territory (1809), and later became the states of Ohio, Michigan, Indiana, Illinois, Wisconsin, and part of eastern Minnesota.