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Northwest Ordinance of 1787
The Northwest Ordinance (formally An Ordinance for the Government of the Territory of the United States, North-West of the River Ohio, and also known as the Freedom Ordinance or The Ordinance of 1787) was an act of the Congress of the Confederation of the United States -
Louisiana Purchase
The Louisiana Purchase (1803) was a land deal between the United States and France, in which the U.S. acquired approximately 827,000 square miles of land west of the Mississippi River for $15 million. -
Lewis and Clark Expedition
The Lewis and Clark Expedition, also known as the Corps of Discovery Expedition, was the first American expedition to cross what is now the western portion of the United States, departing in May 1804, from near St. Louis making their way westward through the continental divide to the Pacific coast. -
War of 1812
Expansion. Battles with Indian nations. The War of 1812. Welcome to America under Republican rule at the onset of the 19th century -
Purchase of Florida from Spain
The Adams–Onís Treaty of 1819, also known as the Transcontinental Treaty, the Florida Purchase Treaty, or the Florida Treaty, was a treaty between the United States and Spain in 1819 that ceded Florida to the U.S. and defined the boundary between the U.S. and New Spain. -
Missouri Compromise
The Missouri Compromise was an effort by Congress to defuse the sectional and political rivalries triggered by the request of Missouri late in 1819 for admission as a state in which slavery would be permitted. -
Mormon Movement
are a religious and cultural group related to Mormonism, the principal branch of the Latter Day Saint movement of Restorationist Christianity, which began with Joseph Smith in upstate New York during the 1820s. -
Eerie Canal
The Erie Canal is a canal in New York that is part of the east-west, cross-state route of the New York State Canal System. Originally, it ran about 363 miles from Albany, on the Hudson River to Buffalo, at Lake Erie. -
Indian Removal Act
The Indian Removal Act was passed by Congress on May 28, 1830, during the presidency of Andrew Jackson. The law authorized the president to negotiate with southern Indian tribes for their removal to federal territory west of the Mississippi River in exchange for their ancestral homelands. -
Trail of Tears
In 1838 and 1839, as part of Andrew Jackson's Indian removal policy, the Cherokee nation was forced to give up its lands east of the Mississippi River and to migrate to an area in present-day Oklahoma -
Annexation of Texas
The Texas annexation was the 1845 incorporation of the Republic of Texas into the United States of America, which was admitted to the Union as the 28th state on December 29, 1845 -
Treaty of Guadalupe Hidalgo
The Treaty of Guadalupe Hidalgo (Tratado de Guadalupe Hidalgo in Spanish), officially entitled the Treaty of Peace, Friendship, Limits and Settlement between the United States of America and the Mexican Republic, is the peace treaty signed on February 2, 1848, -
Oregon Territory
The Territory of Oregon was an organized incorporated territory of the United States that existed from August 14, 1848, until February 14, 1859, when the southwestern portion of the territory was admitted to the Union as the State of Oregon -
California Gold Rush
The California Gold Rush (1848–1855) was a period in American history which began on January 24, 1848, when gold was found by James W. Marshall at Sutter's Mill in Coloma, California. -
Gadsden Purchase
The Gadsden Purchase (known in Mexico as Spanish: Venta de La Mesilla, "Sale of La Mesilla"[1]) is a 29,640-square-mile (76,800 km2) region of present-day southern Arizona and southwestern New Mexico that was purchased by the United States in a treaty signed on December 30, 1853 by James Gadsden who was the American ambassador to Mexico at that time -
Kansas-Nebraska Act
The Kansas-Nebraska Act was passed by the U.S. Congress on May 30, 1854. It allowed people in the territories of Kansas and Nebraska to decide for themselves whether or not to allow slavery within their borders. -
Homestead Act
Signed into law by President Abraham Lincoln on May 20, 1862, the Homestead Act encouraged Western migration by providing settlers 160 acres of public land. -
Transcontinental Railroad
The First Transcontinental Railroad (known originally as the "Pacific Railroad" and later as the "Overland Route") was a 1,907-mile (3,069 km) contiguous railroad line constructed in the United States between 1863 and 1869 west of the Mississippi and Missouri Rivers to connect the Pacific coast at San Francisco Bay with the existing eastern U.S. rail network at Council Bluffs, Iowa. -
The Dawes Act
The Dawes Act of 1887 (also known as the General Allotment Act or the Dawes Severalty Act of 1887), adopted by Congress in 1887, authorized the President of the United States to survey American Indian tribal land and divide it into allotments for individual Indians. -
Spanish-American War
The Spanish-American War of 1898 ended Spain’s colonial empire in the Western Hemisphere and secured the position of the United States as a Pacific power. U.S. victory in the war produced a peace treaty that compelled the Spanish to relinquish claims on Cuba, and to cede sovereignty over Guam, Puerto Rico, and the Philippines to the United States.
