Heroes of History is a unique biography series that brings the shaping of history to life with the remarkable true stories of fascinating men and women who changed the course of history. Meriwether Lewis (1774-1809) had been commissioned by President Jefferson to lead a daring expedition so remarkable it would become one of the most famous explorations in history. He chose as his co-captain William Clark. Their mission: to find a land route to the Pacific Ocean while learning as much as possible about the thousands of miles of unexplored territory they struggled through.