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Cotton Gin Invented
In 1794, U.S.-born inventor Eli Whitney patented the cotton gin, a machine that revolutionized the production of cotton by greatly speeding up the process of removing seeds from cotton fiber. By the mid-19th century, cotton had become America’s leading export. -
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Dates
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XYZ Affair ( No Specific Date)
The XYZ Affair was, in fact, a diplomatic incident between France and America in the late 18th century that led to an undeclared war at sea. After some members of Congress asked to see the diplomats’ reports regarding what had transpired in France, Adams handed them over with the names of the French agents replaced with the letters X, Y and Z; thus the name XYZ Affair. -
Louisiana Purchase
The United States purchased approximately 828,000,000 square miles of territory from France, thereby doubling the size of the young republic. What was known as Louisiana Territory stretched from the Mississippi River in the east to the Rocky Mountains in the west and from the Gulf of Mexico in the south to the Canadian border in the north. -
Adams - Onis Treaty (Florida Purchase Treaty)
Spanish minister Do Luis de Onis and U.S. Secretary of State John Quincy Adams sign the Florida Purchase Treaty, in which Spain agrees to cede the remainder of its old province of Florida to the United States. -
Missouri Compromise
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. At the time, the United States contained twenty-two states, evenly divided between slave and free. -
Monroe Doctrine
The Monroe Doctrine was a U.S. foreign policy regarding domination of the American continent in 1823. It stated that further efforts by European nations to colonize land or interfere with states in North or South America would be viewed as acts of aggression, requiring U.S. intervention. -
Indian Removal Act
Andrew Jackson had long been an advocate of what he called “Indian removal.” As an Army general, he had spent years leading brutal campaigns against the Creeks in Georgia and Alabama and the Seminoles in Florida–campaigns that resulted in the transfer of hundreds of thousands of acres of land from Indian nations to white farmers. -
Trails of Tears
At the beginning of the 1830s, nearly 125,000 Native Americans lived on millions of acres of land in Georgia, Tennessee, Alabama, North Carolina and Florida–land their ancestors had occupied and cultivated for generations. By the end of the decade, very few natives remained anywhere in the southeastern United States. Working on behalf of white settlers who wanted to grow cotton on the Indians’ land, the federal government forced them to leave their homelands and walk thousands of miles. -
The Battle of The Alamo
The arrival of General Antonio López de Santa Anna's army outside San Antonio nearly caught them by surprise. Undaunted, the Texians and Tejanos prepared to defend the Alamo together. The defenders held out for 13 days against Santa Anna's army. -
Texas Claims Independence
During the Texas Revolution, a convention of American Texans meets at Washington-on-the-Brazos and declares the independence of Texas from Mexico. The delegates chose David Burnet as provisional president and confirmed Sam Houston as the commander in chief of all Texan forces. The Texans also adopted a constitution that protected the free practice of slavery, which had been prohibited by Mexican law. -
Texas Annnexed to U.S.
The likelihood of Texas joining the Union as a slave state delayed any formal action by the U.S. Congress for more than a decade. In 1844, Congress finally agreed to annex the territory of Texas. On December 29, 1845, Texas entered the United States as a slave state, broadening the irrepressible differences in the United States over the issue of slavery and setting off the Mexican-American War. -
Mexican - American War (1846-1848)
Marked the first U.S. armed conflict chiefly fought on foreign soil. It pitted a politically divided and militarily unprepared Mexico against the expansionist-minded administration of U.S. President James K. Polk, who believed the United States had a “manifest destiny” to spread across the continent to the Pacific Ocean. When the dust cleared, Mexico had lost about one-third of its territory, including nearly all of present-day California, Utah, Nevada, Arizona and New Mexico. -
Agreement of the 49th parallel
Representatives of Great Britain and the United States sign the Oregon Treaty, which settles a long-standing dispute with Britain over who controlled the Oregon territory. The treaty established the 49th parallel from the Rocky Mountains to the Strait of Georgia as the boundary between the United States and British Canada. The United States gained formal control over the future states of Oregon, Washington, Idaho, and Montana. -
Treaty of Guadalupe Hidalgo
The Treaty of Guadalupe Hidalgo, signed on February 2, 1848, ended the Mexican-American War in favor of the United States. The war had begun almost two years earlier, in May 1846, over a territorial dispute involving Texas. The treaty added an additional 525,000 square miles to United States territory, including the including the land that makes up all or parts of present-day Arizona, California, Colorado, Nevada, New Mexico, Utah and Wyoming. -
Gadsden purchase
An agreement between the United States and Mexico, finalized in 1854, in which the United States agreed to pay Mexico $10 million for a 29,670 square mile portion of Mexico that later became part of Arizona and New Mexico. Gadsden’s Purchase provided the land necessary for a southern transcontinental railroad and attempted to resolve conflicts that lingered after the Mexican-American War. -
Kansas - Nebraska Act
1854 bill that mandated “popular sovereignty”–allowing settlers of a territory to decide whether slavery would be allowed within a new state’s borders. Proposed by Stephen A. Douglas–Abraham Lincoln’s opponent in the influential Lincoln-Douglas debates–the bill overturned the Missouri Compromise’s use of latitude as the boundary between slave and free territory. -
California Becomes a State
Mexico had reluctantly ceded California and much of its northern territory to the United States in the 1848 Treaty of Guadalupe Hidalgo. When the Mexican diplomats signed the treaty, they pictured California as a region of sleepy mission towns with a tiny population of about 7,300-not a devastating loss to the Mexican empire.
