Highest ranking military officer on the northwestern front during the Revolutionary War and the leader of the Kentucky militia that captured Kaskaskia and Vincennes.
He worked as a surveyor before joining the Virginia militia to fight off attacking Indians.
He is thought to have greatly increased the size of the American colonies, especially since he seized modern-day Illinois.
He had ten brothers and sisters, one of whom was famous explorer William Clark.
George Washington supported his military endeavors and helped give him more troops.