On February 5, 1779, Colonel George Rogers Clark and 120 determined American soldiers, left Kaskaskia and began an arduous winter trek eastward to capture the British post of Fort Sackville on the Wabash River, near the town of Vincennes. Many days were spent wading through frigid water, at times up to their necks. To compound matters, their pack horses all died and their provisions dwindled to what the men could carry on their backs.

After capturing Kaskaskia and Cahokia in July 1778, Colonel George Rogers Clark set his sights on the strategically critical British post of Fort Sackville, 200 miles to the east. Clark sent a local delegation to Vincennes who convinced its French inhabitants, never too fond of the British, to switch their allegiance to the American cause. Clark also sent Captain Leonard Helm and a small detachment to safeguard this newest American possession. Word of Clark’s daring exploits reached Fort Detroit, the main British outpost in the region. Its commander, Lieutenant Governor Henry Hamilton, assembled a relief force and headed south.

In 1778, Colonel George Rogers Clark presented a plan to Virginia Governor Patrick Henry and his executive council of Thomas Jefferson, George Mason, and George Wythe to conquer the Illinois Country, part of the Province of Quebec. Clark proposed capturing British forts at Kaskaskia and Cahokia to access badly needed supplies from Spanish Louisiana and force the British to focus their attention away from Kentucky. Incredibly, Clark’s audacious plan to capture these distant British outposts would succeed without firing a shot.