Illinois, state, United States: Early Inhabitants and European Exploration

At the end of the 18th cent. the Illinois, Sac, Fox, and other Native American groups were living in the river forests, where many centuries before them the prehistoric Mound Builders had dwelt. French explorers and missionaries came to the region early. Father Marquette and Louis Jolliet, on their return from a trip down the Mississippi, paddled up the Illinois River in 1673, and two years later Marquette returned to establish a mission in the Illinois country.

In 1679 the French explorer Robert Cavelier, sieur de La Salle, went from Lake Michigan to the Illinois, where he founded (1680) Fort Creve Coeur and with his lieutenant, Henri de Tonti, completed (1682–83) Fort St. Louis on Starved Rock cliff. French occupation of the area was sparse, but the settlements of Cahokia and Kaskaskia achieved a minor importance in the 18th cent., and the area was valued for fur trading.

By the Treaty of Paris of 1763, ending the French and Indian Wars, France ceded all of the Illinois country to Great Britain. However, the British did not take possession until resistance, led by the Ottawa chief, Pontiac, was quelled (1766). In the American Revolution, George Rogers Clark and his expedition captured (1778) the British posts of Cahokia and Kaskaskia before going on to take Vincennes. The Illinois region was an integral part of the Old Northwest that came within U.S. boundaries by the 1783 Treaty of Paris ending the American Revolution. Under the Ordinance of 1787 the area became the Northwest Territory. Made part of Indiana Territory in 1800, Illinois became a separate territory in 1809.

Sections in this article:

• Introduction
• Diversification and Change
• Discontent and the Rise of the Labor Movement
• Industrialization and Abraham Lincoln
• Statehood and Settlement
• Early Inhabitants and European Exploration
• Government, Politics, and Higher Education
• Economy
• Geography
• Facts and Figures

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