1.
Territory In 1846, Great Britain gained sole possession of the land north of the 49th parallel, while the United States received the Oregon Territory south of that line.
2.
Purchase In 1853, the United States purchased land from Mexico for $10 million that included the southern parts of Arizona and New Mexico.
3.
Cession Refers to the southwestern territory of modern America that was gained as a result of the Mexican American War in 1848.
4.
Railroad Railroad built to span from Omaha, Nebraska to Sacramento, California.
5.
Annexation The 1845 incorporation of the Republic of Texas into the United States, which was admitted to the Union as the 28th state.
6.
Gold-seeking migrants who moved to California during the Gold Rush.
7.
Trail A 2000-mile trail stretching through the Great Plains from western Missouri to the Oregon Territory.
8.
and Clark Expedition An expedition led by Meriwether Lewis and William Clark that began in 1804 to explore the Louisiana Purchase.
9.
Removal Act In 1830, a congressional act that authorized the removal of Native Americans who lived east of the Mississippi River.
10.
Men Men hired by eastern companies to trap animals for fur in the Rocky Mountains and other regions of the United States.
11.
A Spanish mission in San Antonio, Texas, that was the site of a famous battle of the Texas Revolution in 1836.
12.
Purchase In October 20, 1803, the Senate approved the purchase of French land between the Mississippi River and the Rocky Mountains that doubled the size of the United States.
13.
K. Polk The 11th President of the United States who annexed Oregon and Texas and led the nation to a sweeping victory in the Mexican-American War.
14.
of San Jacinto In 1836, the final battle of the Texas Revolution which resulted in the defeat of the Mexican Army and independence for Texas.
15.
of Guadalupe Hidalgo In 1848, a treaty that ended the Mexican-American War and gave the United States much of Mexico's northern territory. It also ensured the rights and religious freedom of the people living in that territory.
