On July 11, 1798, a body of less than 1, 000 men was formally established as a United States Marine Corps. Over the next 100 years, although still relatively few in number, they were frequently dispatched overseas in a key role when U.S. interests were threatened. The Marines saw action in many places. Using some remarkable archive footage, this program develops the valiant story of the U.S. Marines through World War 2 to Korea and Vietnam.