Important Event
This 1803 deal doubled the size of the U.S.
Louisiana Purchase
He explored the new territory gained from the Louisiana Purchase.
Meriwether Lewis
This territory was acquired peacefully from France in 1803.
Louisiana Territory
This act forced Native Americans off their land in the 1830s.
Indian Removal Act
This animal was crucial for plains travel before railroads.
horse
The year gold was discovered in California, sparking mass migration.
1848
She helped guide the Lewis and Clark expedition.
Sacagawea
The U.S. gained this large area from Mexico in 1848.
Mexican Cession
The forced march of the Cherokee is known as this.
Trail of Tears
These covered wagons were used by pioneers heading west.
Conestoga wagons
This belief justified U.S. expansion across North America.
Manifest Destiny
He coined the term "Manifest Destiny."
John O'Sullivan
The U.S. annexed this independent republic in 1845.
Texas
These were created to contain and control Native populations.
reservations
The invention that allowed boats to go upstream
steamboat
This act gave settlers 160 acres of land for a small fee and work.
Homestead Act
President during the Mexican-American War.
James K. Polk
The U.S. and Britain peacefully divided this Pacific Northwest land.
Oregon Country
Famous Sioux leader at the Battle of Little Bighorn.
Sitting Bull
Completed in 1869, it connected the east and west by rail.
Transcontinental Railroad
This war resulted in the U.S. gaining much of the Southwest.
Mexican American War
Leader of the Mormons who moved his people to Utah.
Brigham Young
This southern strip of land was purchased from Mexico in 1853.
Gadsden Purchase
This 1890 massacre marked the end of major Native resistance.
Wounded Knee Massacre
This invention helped farmers plow tough soil on the Great Plains.
steel plow