Meriwether Lewis 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 (1774-1809).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. The stories of Heroes of History are told in an engaging narrative format, where related history, geography, government, and science topics come to life and make a lasting impression. This is a premier biography line for the entire family.