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Cotton Gin invented
Eli Whitney was an American inventor best known for inventing the cotton gin. This was one of the key inventions of the Industrial Revolution and shaped the economy of the Antebellum South. -
XYZ Affair
The XYZ Affair was a political and diplomatic episode in 1797 and 1798, early in the administration of John Adams, involving a confrontation between the United States -
Louisiana Purchase
President Thomas Jefferson commissioned the Corps of Discovery Expedition 1804-06 led by Meriwether Lewis and William Clark to explore the territory acquired in the Louisiana Purchase -
Agreement of 49th Parallel
The Treaty of 1818 set the boundary between the United States and British North America along the 49th parallel of north latitude from Minnesota to the -
Adams-Onis Treaty
The Adams–Onís Treaty of 1819, also known as the Transcontinental Treaty, the Florida Purchase Treaty -
Missouri Compromise
In an effort to preserve the balance of power in Congress between slave and free states, the Missouri Compromise was passed in 1820 -
Monroe Doctrine
The Monroe Doctrine is the best known U.S. policy toward the Western Hemisphere. Buried in a routine annual message delivered to Congress by President James Monroe in December 1823, -
The Battle of the Alamo
The Battle of the Alamo was a pivotal event in the Texas Revolution. Following a 13-day siege Mexican troops under President General Antonio López de Santa Anna -
The Texas Declaration of Independence was the formal declaration of independence of the Republic of Texas from Mexico in the Texas Revolution.
The Texas Declaration of Independence was the formal declaration of independence of the Republic of Texas from Mexico in the Texas Revolution. -
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 -
Indian Removal Act/Trail of Tears
Over 20,000 Cherokees were forced to march westward along the Trail of Tears. About a quarter of them died along the way. -
Texas annexed to U.S.
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. -
Mexican-American War
The Mexican–American War, also known as the Mexican War, the U.S.–Mexican War or the Invasion of Mexico -
Treaty of Guadalupe Hidalgo
officially entitled the Treaty of Peace, Friendship, Limits and Settlement between the United States of America and the Mexican Republic, -
California becomes a state
California, a western U.S. state, stretches from the Mexican border along the Pacific for nearly 900 miles. -
Gadsden Purchase
The Gadsden Purchase is a 29,670-square-mile region of present-day southern Arizona -
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
