Illinois campaign
The Illinois campaign, also known as Clark's Northwestern campaign (1778-1779), was a series of events during the American Revolutionary War in which a small force of Virginia militiamen, led by George Rogers Clark, seized control of several British posts in the Illinois Country of the Province of Quebec, in what are now Illinois and Indiana in the Midwestern United States. The campaign is the best-known action of the western theater of the war and the source of Clark's reputation as an early American military hero.