High Quality Content by WIKIPEDIA articles! George Rogers Clark (November 19, 1752 – February 13, 1818) was a soldier from Virginia and the highest ranking American military officer on the northwestern frontier during the American Revolutionary War. He served as leader of the Kentucky (then part of Virginia) militia throughout much of the war. Clark is best known for his celebrated captures of Kaskaskia (1778) and Vincennes (1779), which greatly weakened British influence in the Northwest Territory. Because the British ceded the entire Northwest Territory to the United States in the 1783 Treaty of Paris, Clark has often been hailed as the "Conqueror of the Old Northwest."