Section 1 of the amendment declares that all persons born or naturalized in the United States are American citizens and citizens of their state of residence...
In U.S. history, political party formed to promote public control of the means of production and distribution. In 1898 the Social Democratic party was formed by a group led by Eugene V. Debs and Victor Berger...
In US history, the belief that Americans had a providential mission to extend both their territory and their democratic processes westwards across the continent.
A movement culminating in the late 18th and early 19th centuries that aimed first to end the slave trade, and then to abolish the institution of slavery and emancipate slaves.
The largest civil engineering project in western history to that date, the railroad was over 4,800 km/3,000 mi long and crossed deserts, canyons, and mountains, requiring the development of new construction techniques.
Slaughter of 450 Cheyenne and Arapaho by the 3rd Colorado Volunteers under Col John Chivington, during an unprovoked attack on Cheyenne peace chief Black Kettle's camp at Sand Creek, Colorado, on 29 November 1864.
The Battle of the Little Bighorn took place on 25 June 1876. It resulted in the death of about 265 officers and troops of the 7th Cavalry under the command of General George Armstrong Custer. The battle was the most serious defeat of the US army during the war for the Great Plains.
Sometimes called ‘the War Between the States’ or ‘the Second American Revolution’, a conflict in the USA which resolved two great issues: the nature of the Federal Union and the relative power of the states and the central government; and the existence of black slavery.
The influx of prospectors to the Sierra Nevada Mountains, California, following the discovery of gold in the American River by US surveyor James Marshall in January 1848.
Case decided in 1819 by the U.S. Supreme Court, dealing specifically with the constitutionality of a Congress-chartered corporation, and more generally with the dispersion of power between state and federal governments.
A series of seven debates between the Democrat senator Stephen A Douglas and Republican Abraham Lincoln held August-October during the 1858 race for Illinois State senator.
Culminating in the late 18th and early 19th centuries that aimed first to end the slave trade, and then to abolish the institution of slavery and emancipate slaves...
movement during the first quarter of the 20th cent. whereby the immigrant in the United States was induced to assimilate American speech, ideals, traditions, and ways of life...
In U.S. history, a broadly based reform movement that reached its height early in the 20th cent. In the decades following the Civil War rapid industrialization transformed the United States...
Institution based on a relationship of dominance and submission, whereby one person owns another and can exact from that person labor or other services.
...built up with the arrival of the Portuguese in Africa and the development of the labour-intensive plantation system in the W African islands of São Tomé and Principe, Brazil, the Caribbean, the southern American colonies, and later the Indian Ocean islands and South and East Africa...
"The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people..."
In U.S. history, loosely organized system for helping fugitive slaves escape to Canada or to areas of safety in free states. It was run by local groups of Northern abolitionists, both white and free blacks...
Slavery in America by 
The Underground Railroad: An Encyclopedia of People, Places, and Operations
Forced march of Indian tribes from the eastern United States to Oklahoma.