Westward Expansion1800 - 1850

Unit 1

Manifest DestinyThe belief that the United States

has a divine right to expand its territory.

*John L. O’Sullivan coined the phrase

Thomas Jefferson• 3rd President of the United

States (1800 – 1808)– Political philosopher,

horticulturist, architect, inventor and much more

– Louisiana Purchase (1803)– Lewis and Clark Expedition

(1804-1806)

Louisiana Purchase

The Louisiana Purchase 1803

• James Monroe and Robert Livingston buy the land for about 15 million.

3 cents an acre!

The purchase doubles the size of our country

Lewis and Clark Expedition

Meriwether Lewis 1774-1809

William Clark 1770-1838

40 people went on trip

Sacajawea• Husband – Touissant

Charonneau– Insists on bringing wife

and child• Tribe – Shoshone• Name – Bird woman

Texas Independence

• 1836 -Texas declares its independence from Mexico.

• 1836 – 1845 Texas becomes a country (the Republic of Texas)

• 1845 Texas becomes a state

Florida

• March 3rd 1845 Florida becomes a state

Oregon Country

• In 1846 the U. S. makes an agreement with Great Britain to get the Oregon Country

The Mexican War1846 - 1847

• disagreement of the Texas southern border, the Rio Grande River.

• Major General Winfield Scott captures Mexico City ending the war.

• The Treaty of Guadalupe-Hidalgo ends the war and the U. S. gets the Mexican Cession.

The Gadsden Purchase

• The U. S. paid Mexico 10 million dollars for a strip of land south of the Gila River in Arizona and New Mexico.

• route for a southern transcontinental railroad.