Name: Lewis and Clark Meriwether Lewis • One of the leaders of the Lewis and Clark expedition • President Jefferson’s private secretary William Clark • One of the leaders of the Lewis and Clark expedition • Called the “Redheaded Chief” Louisiana Purchase • land bought by the United States from France • cost 15 million dollars •__doubled_the_size_of_the_United_States Oregon Country • the name land between the Northern Rockies and Pacific Ocean was once called • included the states of Oregon, Idaho, Washington, and parts of Wyoming, Montana, and_Canada Jefferson Peace Medals • silver medals • President Jefferson’s picture on one side • hands grasped in friendship on the other • given to important Indian Chiefs met on the expedition Missouri River • river that the expedition started out on Seaman • Lewis’s dog Pierre Cruzatte • expert boatman and fiddler Sergeant John Floyd • the only man to die on the expedition Fort Mandan • where the expedition spent their first winter Pierre Dorian • fur trapper hired to help talk to the Indians interpreter • a person who can help people who speak different_languages_talk_to_each_other York • Clark’s black servant Charbonneau • a French man hired as an interpreter Sacajawea • a Shoshone girl who helped Lewis and Clark • married to Charbonneau portage • carrying boats and supplies around rapids or falls on a river Cameahwait • Shoshone Chief who helped Lewis and Clark • Sacajawea’s relative Old Toby • a Shoshone Indian guide Lob Pass • trail over the Bitterroot Mountains Fort Clatsop • fort built by the expedition on the Pacific Ocean Lewiston • city in Idaho named after Lewis Clarkston • city in Washington named for Clark.