http://www.lewis-clark.org/content/content-channel.asp?ChannelID=256
It's a very interesting link about Lewis and Clark.
The Lewis and Clark Expedition, or ″Corps of Discovery Expedition"(1804–1806) was the first transcontinental expedition to the Pacific Coast by the United States. Commissioned by President Thomas Jefferson and led by two Virginia-born veterans of Indian wars in the Ohio Valley, Meriwether Lewis and William Clark, the expedition had several goals. Their objects were both scientific and commercial – to study the area's plants, animal life, and geography, and to discover how the region could be exploited economically. They were accompanied by a fifteen-year-old Shoshone Indian woman, Sacagawea, the wife of a French-Canadian fur trader. After crossing the Rocky Mountains, the expedition reached the Pacific Ocean in the area of present-day Oregon (which lay beyond the nation's new boundaries) in November 1805. They returned in 1806, bringing with them an immense amount of information about the region as well as numerous plant and animal specimens. Reports about geography, plant and animal life, and Indian cultures filled their daily journals. Although Lewis and Clark failed to find a commercial route to Asia, they demonstrated the possibility of overland travel to the Pacific coast. Today, no US exploration party is more famous, and no American expedition leaders are more instantly recognizable by name.
They went through the states Pennsylvania, Virginia, West Virginia, Kentucky, Indiana, Illinois, Misssouri, Kansas, Iowa, Nebraska, South and North Dakot, Montana, Idaho, Washington, Oregon.
During their expedition Lewis and Clark met different tribes. On this link you can explore Mandan, Hidatsa and Arikara.
http://www.trailtribes.org/kniferiver/home.htm
The Mandan, Hidatsa, and Arikara (Sahnish) now live together as the Three Affiliated Tribes on the Fort Berthold Reservation in west-central North Dakota, encompassing Lake Sakakawea. Origin stories and anthropological evidence document a complex sequence of movements prior to the arrival in the Knife-Heart region of the Missouri River by various bands of the Mandan with the Hidatsa over the last 900 years, followed by the Arikara in the early 19th century.
And here you can explore their relatoinships with USA.
http://www.trailtribes.org/kniferiver/the-fur-trade.htm
