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Following the American Revolution, Great Britain gave up their land holdings west of the Appalachian Mountains.

This became known as the Northwest Territory. It was officially incorporated with the Northwest Ordinance of 1787.

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When Thomas Jefferson became president in 1801, most of the population of the united states lived within 50-100 miles of the Atlantic ocean.

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Meriwether Lewis and William Clark led the U.S. Corps of Discovery on an historic expedition across the western lands of North America in the early 1800s,Tasked by President Thomas Jefferson to map the territory, establish friendly trade relationships with native tribes.

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The Louisiana Purchase was the acquisition of the Louisiana Territory from France in 1803. The United States paid $15 million dollars (about a quarter of a billion dollars in today’s dollars) for approximately 827,000 square miles of land.

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Before the journey began, President Jefferson sent Lewis to Philadelphia to study map making, botany, and medicine with some of the leading scientists of the day. By October 1803, Lewis and Clark set up Camp Dubois near the east bank of the A Mississippi River, where they trained volunteers and stocked up on supplies.

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On May 14, 1804, the “Corps of Volunteers for North West Discovery,” which included Lewis and Clark and four dozen other men, started up the Missouri River aboard a 55-foot-long keelboat and two smaller boats. As they traveled, Clark spent much of his time making maps and charting the course, while Lewis studied the region’s rocks, soil, animals, and plants.

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The bilingual Shoshone woman Sacagawea  accompanied the Lewis and Clark Corps of Discovery expedition in 1805-06. Her skills as a translator were invaluable, as was her intimate knowledge of some difficult terrain.

-Perhaps most significant was her calming presence on both the expeditioners and the Native Americans they encountered, who might have otherwise been

hostile to strangers.(while caring her son)

*All the way to Oregon

-In March 1806, the expedition prepared to make the return journey. In July, Lewis and Clark divided into two groups: Lewis followed the Missouri River and Clark took a group to explore the Yellowstone River, During his exploration, Clark carved “W Clark July 25 1806” onto a rock formation—the only physical evidence of the entire expedition.

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Due to the Slave Trade Clause in the Constitution, Congress could not ban the Trans Atlantic Slave Trade until 1807.

In January 1807, with a  population of over four million enslaved people in the South, some Southern congressmen joined with the North in voting to abolish the African slave trade, an act that became effective

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January 1, 1808.

The  trade of enslaved people within the South was still allowed, however, and children of enslaved people automatically became enslaved, ensuring a self-sustaining enslaved population in the South.

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thanks to the high brit rate and brisk immigration, the U.S population exploded in the first half of the 19th century from around 5 million people in 1800 to more then 23 million by 1850,religious motuations and desrie to spread religon to negavive americans also drove americans west.

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A significant push toward the west coast of North America began in the 1810s. It was called man Manifest Destiny.Federally issued Indian removal acts, and economic promise. Pioneers traveled to Oregon and California using a network of trails leading west.

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Britain owned canda. The British and America governments.1815

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It was an negotiation, President negotioed to divied oregan into two parts.1816

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It was an war. florida cession from spain then they negotited.1819

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The compromise divided the lands of the Louisiona purchase into two parts.

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After Texas thretaend to become a territory of britan

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A war fought over the rights to Texas. After the war, the United States paid Mexico $15 million for land that would later become Califorina, Texas, Arizona, Nevada, utah and parts of several others states.

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A boundarry dispute arose between the united states it was an war.

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After the expedition, Lewis was named governor of the Louisiana Territory. He planned to publish the journals from the trip, but had trouble completing them. Just three years later, Lewis died.