A device that used electrical signals to send messages quickly over long distances

A skilled mapmaker and outdoorsman chosen to explore the Louisiana Territory

Self-appointed law enforcers

not taking sides

People who went to California looking for Gold (They left in 1849)

an abandoned mission near San Antonio that became an important battle site in the Texas Revolution

A journey made for a special purpose

President who changed the boundaries of the United States with the Louisiana Purchase.

British practice of taking American sailors and forcing them into military service

11th President of the United States from Tennessee; committed to westward expansion; led the country during the Mexican War; during his administration

A Shoshone woman whose language skills and knowledge of geography helped Lewis and Clark

To give up

2000 mile long path along which thousands of Americans journeyed to the Willamette Valley in the 1840's.