THE LEWIS AND CLARK EXPEDITION The Lewis and Clark Expedition were an important journey and a foundation of the creation of the United States. Meriwether Lewis and William Clark set out on the exploration of the land gained by the Louisiana Purchase on May 1804. Lewis and Clark did not want was ahead on their long journey. I believe that the journey they made would not have been as successful without the help of the Indian tribes they met along the way. Also without the help of the French Canadian translator's wife, Sacajewa, the journey would have been a failure. She was a Shoshone Indian and helped the party as an interpreter and peacemaker, she also p