Read about what the Yankton Sioux wanted from Lewis and Clark and why they were disappointed when they met the Corps of Discovery on its journey up the Missouri River. From PBS.

Part of the PBS site, "The West," this link gives a general explanation of the Lewis and Clark expedition. Links to biographies.

A brief look at the life of American explorer, Meriwether Lewis. Provides a historical map of the Oregon Territory, a portrait of Lewis, and a photograph from Little Belt Mountain.

This site provides a chronology of Lewis and Clark's expedition to the West from 1804-06. There are also brief biographies of the two explorers and the site provides descriptions of 80 historic sites that now exist along the Lewis and...