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Library of Congress Established
The Library of Congress, established by an act of Congress of April 24, 1800, was initially housed in the U.S. Capitol. -
Louisiana Purchase
The Louisiana Purchase was the acquisition of the territory of Louisiana by the United States from the French First Republic in 1803. This consisted of most of the land in the Mississippi River's drainage basin west of the river. -
12th Amendment added
Electing the President and Vice President” Amendment Twelve to the Constitution was ratified on June 15, 1804. It revises and outlines the procedure of how Presidents and Vice Presidents are elected, specifically so that they are elected together. -
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Lewis and Clark expedition
The Lewis and Clark Expedition, also known as the Corps of Discovery Expedition, was the United States expedition to cross the newly acquired western portion of the country after the Louisiana Purchase. -
War and 1812
The War of 1812 was fought by the United States of America and its indigenous allies against the United Kingdom and its own indigenous allies in British North America, with limited participation by Spain in Florida. -
Monroe Doctrine
The Monroe Doctrine is a United States foreign policy position that opposes European colonialism in the Western Hemisphere. It holds that any intervention in the political affairs of the Americas by foreign powers is a potentially hostile act against the United States. -
Indian removal act
Authorizing the president to grant unsettled lands west of the Mississippi in exchange for Indian lands within existing state borders. A few tribes went peacefully, but many resisted the relocation policy. -
Fugitive Slave act
The act required that slaves be returned to their owners, even if they were in a free state. The act also made the federal government responsible for finding, returning, and trying escaped slaves. -
Plain Wars
Plains Wars, a series of conflicts from the early 1850s through the late 1870s between Native Americans and the United States, along with its Indian allies, over control of the Great Plains between the Mississippi River and the Rocky Mountains. -
"Uncle Tom's Cabin" published
The novel had a profound effect on attitudes toward African Americans and slavery in the U.S., and is said to have "helped lay the groundwork for the [American] Civil War"