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Lewis and Clark: America in 1801

Related Article: Learn more about Lewis and Clark.

Thomas Jefferson was President when there were only 17 states in the Union.

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The Lewis and Clark Expedition (1:07)

From the Archives of Discovery: In 1803, Meriwether Lewis and William Clark set out to find an all-water route through the United States to the Pacific Ocean. Learn more about the Lewis and Clark expedition in this video.

The Colonial Frontier: Don Juan de Onate (3:17)

Don Juan de Onate launched a campaign in New Mexico that was largely unsuccessful.

Lewis and Clark: Program Introduction (1:00)

The Lewis and Clark Expedition opened a new chapter in the history of a continent.

Lewis and Clark: America in 1801 (1:25)

Thomas Jefferson was President when there were only 17 states in the Union.

Lewis and Clark: Following the Expedition (3:38)

The Lewis and Clark expedition of 33 people built over 600 campsites and carried thousands of pounds of equipment. Using journals from the expedition, archeologists retrace the explorers' steps.

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The Mexican War: Shifting National Boundaries (1:36)

Shortly after Spain transferred a huge tract of land west of the Mississippi to France, France sold it to the U.S.

The Mexican War: Consequences (1:14)

The addition of vast U.S. land -- much of it as slave territory -- proved so divisive it led directly to the Civil War.

Lewis and Clark: Analyzing Samples (1:47)

The types of bone found correspond with journals' reports. The types of cuts on the bone are consistent with metal tools.

Gone West: The Oregon Trail (1:28)

The Oregon Trail brought Americans to the Oregon country.

Gone West: The Santa Fe Trail (1:23)

The Santa Fe Trail was an important western trade route.

Gone West: The Lewis and Clark Expedition (0:39)

Lewis and Clark were sent to explore the West.

Pioneer Spirit: The Oregon Trail (4:50)

The 2,000-mile Oregon trail was arduous. Upon arrival, American settlers had to hew out a farm from uncultivated land.

Pioneer Spirit: Wagon Trains (2:39)

In 1843, “Oregon fever” swept America, in spite of treaty issues between Britain and America. People settled Oregon in the wake of an 1837 economic depression.

Pioneer Spirit: The Oregon Territory (2:12)

America gained rights to the Oregon territory through the Louisiana purchase from France and the 1813 Florida purchase treaty with Spain.

Pioneer Spirit: The Northwest Passage (0:35)

European settlers in Oregon attempted to discover river passages back to the east.