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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 admitting Missouri as a slave state and Maine as a free state -
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 doctrine warns European nations that the United States would not tolerate further colonization or puppet monarchs. -
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. -
Battle of the Alamo
On February 23, 1836, a Mexican force numbering in the thousands and led by General Antonio Lopez de Santa Anna began a siege of the fort. Though vastly outnumbered, the Alamo’s 200 defenders–commanded by James Bowie and William Travis and including the famed frontiersman Davy Crockett–held out courageously for 13 days before the Mexican invaders finally overpowered them. -
Panic of 1837
The Panic of 1837 was a financial crisis in the United States that touched off a major recession that lasted until the mid-1840s. Profits, prices, and wages went down while unemployment went up. Pessimism abounded during the time. -
Sutter's Fort
In 1848, James Marshall, a carpenter working for Sutter, discovered gold at the sawmill Sutter was having built in Coloma, on the American River. Before the mill could be finished, word of the discovery was out. Sutter's workers deserted the Fort for the goldfields seeking their fortunes. By the 1850's, all that was left of Sutter's Fort was the central building. -
Pre-Emption Act
Preemption Act, statute passed (1841) by the U.S. Congress in response to the demands of the Western states that squatters be allowed to preempt lands. Pioneers often settled on public lands before they could be surveyed and auctioned by the U.S. government. -
US - Mexican War
The Mexican–American War, also known as the Mexican War, the U.S.–Mexican War or the Invasion of Mexico, was an armed conflict between the United States of America and the United Mexican States from 1846 to 1848. -
Bear Flag Revolt
During the Bear Flag Revolt, from June to July 1846, a small group of American settlers in California rebelled against the Mexican government and proclaimed California an independent republic. The republic was short-lived because soon after the Bear Flag was raised, the U.S. military began occupying California, which went on to join the union in 1850. The Bear Flag became the official state flag in 1911. -
Fugitive Slave Law
The Fugitive Slave Law or Fugitive Slave Act was passed by the United States Congress on September 18, 1850, as part of the Compromise of 1850 between Southern slave-holding interests and Northern Free-Soilers. -
Compromise of 1850
The Compromise of 1850 was a package of five separate bills passed by the United States Congress in September 1850, which defused a four-year political confrontation between slave and free states regarding the status of territories acquired during the Mexican–American War (1846–1848). -
Gadsden Purchase
The Gadsden Purchase is a 29,670-square-mile region of present-day southern Arizona and southwestern New Mexico that the United States purchased via a treaty signed on December 30, 1853, by James Gadsden, American ambassador to Mexico at that time. -
Bleeding Kansas
Bleeding Kansas, Bloody Kansas or the Border War was a series of violent political confrontations in the United States involving anti-slavery "Free-Staters" and pro-slavery "Border Ruffian", or "southern yankees" elements in Kansas between 1854 and 1861, including "Bleeding Congress". -
Dred Scott Decision
Dred Scott v. Sandford, 60 U.S. 393, also known simply as the Dred Scott case, was a landmark decision by the United States Supreme Court on US labor law and constitutional law. -
Harper's Ferry
In October 1859, the U.S. military arsenal at Harpers Ferry was the target of an assault by an armed band of abolitionists led by John Brown (1800-59). -
Civil War
The war resolved two fundamental questions left unresolved by the revolution: whether the United States was to be a dissolvable confederation of sovereign states or an indivisible nation with a sovereign national government; and whether this nation, born of a declaration that all men were created with an equal right to liberty, would continue to exist as the largest slaveholding country in the world. -
Gettsyburg
The Battle of Gettysburg was fought July 1–3, 1863, in and around the town of Gettysburg, Pennsylvania, by Union and Confederate forces during the American Civil War. -
Emancipation Proclamation
The Emancipation Proclamation was a presidential proclamation and executive order issued by President Abraham Lincoln -
Gettysburg Address
The Gettysburg Address is a speech delivered by Abraham Lincoln at the November 19, 1863, dedication of Soldier's National Cemetery, a cemetery for Union soldiers killed at the Battle Of Gettysburg during the American Civil War. -
13th Amendment
Passed by Congress on January 31, 1865, and ratified on December 6, 1865, the 13th amendment abolished slavery in the United States. The 13th amendment, which formally abolished slavery in the United States, passed the Senate on April 8, 1864, and the House on January 31, 1865 -
14th Amendment
The 14th Amendment to the Constitution was ratified on July 9, 1868, and granted citizenship to “all persons born or naturalized in the United States,” which included former slaves recently freed. -
15th Amendment
Passed by Congress February 26, 1869, and ratified February 3, 1870, the 15th amendment granted African American men the right to vote.