Causes of Expansion
This belief said Americans were destined to expand across the continent.
What is Manifest Destiny?
This 1803 land deal doubled the size of the United States.
What is the Louisiana Purchase?
This U.S. president approved the Louisiana Purchase in 1803.
Who is Thomas Jefferson?
His policy warned European countries not to interfere in the Western Hemisphere.
What is the Monroe Doctrine?
Westward expansion led to conflicts between settlers and the group of people already living on the land.
Who are Native Americans?
Many Americans moved West for cheap land and new opportunities for this activity.
What is farming?
This war between the United States and Mexico ended in 1848 and added large western lands to the U.S.
What is the Mexican-American War?
This explorer led the expedition West after the Louisiana Purchase with William Clark.
Who is Meriwether Lewis?
This 1819 agreement between the U.S. and Spain gave Florida to the United States.
What is the Adams-Onís Treaty?
Expansion increased tensions over whether new territories would allow this practice.
What is slavery?
The discovery of this precious metal in California in 1848 brought thousands West.
What is gold?
The 1846 agreement with Britain divided the Oregon Territory at the 49th parallel.
What is the Oregon Treaty?
This Native American woman helped guide the Lewis and Clark expedition.
Who is Sacagawea?
This treaty ended the Mexican-American War and gave the U.S. California and the Southwest.
What is the Treaty of Guadalupe Hidalgo?
This 1849 event caused rapid population growth in California.
What is the California Gold Rush?
Many settlers traveled West using this famous wagon route to Oregon.
What is the Oregon Trail?
This trail allowed settlers to travel from Missouri to the Pacific Northwest.
What is the Oregon Trail?
This U.S. president strongly supported Manifest Destiny and oversaw the Mexican-American War.
Who is James K. Polk?
This phrase described U.S. efforts to gain influence and territory beyond its borders.
What is diplomatic assertiveness?
As settlers moved West, Native Americans were often forced off their lands through relocation or war.
What is the displacement of Native Americans?
This idea meant the U.S. believed it had the right to spread its culture and government westward.
What is American expansionism?
This 1853 purchase from Mexico helped complete a southern railroad route.
What is the Gadsden Purchase?
This Mexican general and leader fought against U.S. forces during the Mexican-American War.
Who is Antonio López de Santa Anna?
This slogan meant the U.S. wanted all of the Oregon Territory up to latitude 54°40′.
What is "54°40′ or Fight!"
The expansion of the United States increased its power and influence in this region of the world.
What is North America?