US Expansion Since 1783

US Expansion
Since 1783
Original U.S.
1783 - Boundary extends west to Miss. River,
South to Florida and North to Canada
Louisiana Purchase
When - 1803
Where -Extends border west of Miss River to
Rocky Mts
How: Purchased from France (Napoleon) for
$15 million
British Cession
1818 Where: Carved out Northwestern Minnesota
and Northeastern North Dakota. Sets 49th
parallel as border with Canada
How: Convention of 1818
When: 1821
Where: Florida and southern parts of Georgia
and Alabama
How: Adams-Onis Treaty - purchased from
Spain for $5 million
Texas Annexation
When - 1845
Where: Texas and parts north into Wyoming
How: Texas won independent status after
defeating Santa Anna’s army in 1836. US
decides to annex Texas in 1845 risking war
with Mexico
Please copy this onto your summary
Oregon Territory
Where: Northwestern corner - Washington,
Oregon, Idaho, Wyoming
How: Dispute over western part of Oregon
territory. Polk ran on campaign of “Fifty Four
Forty or Fight” - threatening to go to war with
Britain to gain more land in Oregon Country.
Negotiated 49th parallel border in treaty
Manifest Destiny
Belief that Americans had a right to spread
across the continent
Used this belief to justify taking lands from
people they considered inferior: Native
Americans, Mexicans
Please copy this onto bottom of your
summary sheet
Mexican Cession
Where: Southwestern US
How: Guadalupe-Hidalgo treaty ending
Mexican-American war 1846-1848
- US paid $15 mill. as part of treaty
Gadsden Purchase
Where: Southern Arizona and New Mexico set southern and final boundary of U.S.
How: Purchased from Mexico for $10 mill to
secure boundary and complete railroad