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Americanization is the process of an immigrant to the United States of America becoming a person who shares American values, beliefs and customs and is fully assimilated into American society. This process typically involves learning the English language and adjusting to American culture, values and customs, while simultaneously maintaining or incorporating one's own. Historically, the ethnic groups that had undergone Americanization have not only retained their traditional cuisines, but also spread them to wider American population; the best example of this being the adoption and popularity of pizza, a mainstay of modern American cuisine.

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The Reservation System served as the most effective way to handle the Native Americans. The government would move each tribe onto a specific area of land, a reservation. In 1858, commissioner of Indian Affairs, Charles Mix stated that the Indians should have enough land to live on and should be provided with the tools needed to become farmers. The goal: turn the Native Americans into farmers. Also, the children were forced to leave their families to attend boarding school to be educated. The purpose of this was to put the Native Americans to work. This increased Indian dependency and diminished traditional Indian ways.

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In the 19th century, manifest destiny was a widely held belief in the United States that its settlers were destined to expand across North America.

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The Dawes Act of 1887, adopted by Congress in 1887, authorized the President of the United States to survey American Indian tribal land and divide it into allotments for individual Indians. Those who accepted allotments and lived separately from the tribe would be granted United States citizenship. The Dawes Act was amended in 1891, in 1898 by the Curtis Act, and again in 1906 by the Burke Act.

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The Compromise of 1877 was a purported informal, unwritten deal that settled the intensely disputed 1876 U.S. presidential election. It resulted in the United States federal government pulling the last troops out of the South, and formally ended the Reconstruction Era. Through the Compromise, Republican Rutherford B. Hayes was awarded the White House over Democrat Samuel J. Tilden on the understanding that Hayes would remove the federal troops whose support was essential for the survival of Republican state governments in South Carolina, Florida and Louisiana.

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The Ku Klux Klan, commonly called the KKK or simply the Klan, is the name of three distinct movements in the United States that have advocated extremist reactionary positions such as white supremacy, white nationalism, anti-immigration and—especially in later iterations—Nordicism, anti-Catholicism and antisemitism. Historically, the KKK used terrorism—both physical assault and murder—against groups or individuals whom they opposed. All three movements have called for the "purification" of American society and all are considered right-wing extremistorganizations.

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Plessy v. Ferguson,  (1896) was a landmark constitutional law case of the US Supreme Court decided in 1896. It upheld state racial segregationlaws for public facilities under the doctrine of "separate but equal". The decision was handed down by a vote of 7 to 1 with the majority opinion written by Justice Henry Billings Brown and the dissent written by Justice John Marshall Harlan.

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Sharecropping became widespread in the South as a response to economic upheaval caused by the end of slavery during and after Reconstruction. Sharecropping was a way for very poor farmers, both White and Black, to earn a living from land owned by someone else. The landowner provided land, housing, tools and seed, and perhaps a mule, and a local merchant provided food and supplies on credit. At harvest time, the sharecropper received a share of the crop (from one-third to one-half, with the landowner taking the rest). The cropper used his share to pay off his debt to the merchant.

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Jim Crow laws were state and local laws that enforced racial segregation in the Southern United States. Enacted by white Democratic-dominated state legislatures in the late 19th century after the Reconstruction period, these laws continued to be enforced until 1965. They mandated de jure racial segregation in all public facilities in the states of the former Confederate States of America, starting in 1896 with a "separate but equal" status for African Americans in railroad cars. Public education had essentially been segregated since its establishment in most of the South after the Civil War.

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In the United States, the Black Codes were laws passed by Democrat-controlled Southern states in 1865 and 1866, after the Civil War. These laws had the intent and the effect of restricting African Americans' freedom, and of compelling them to work in a labor economy based on low wages or debt. Black Codes were part of a larger pattern of Southern whites trying to suppress the new freedom of emancipated African American slaves, the freedmen.

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The Reconstruction Amendments are the Thirteenth, Fourteenth, and Fifteenth amendments to the United States Constitution,[1] adopted between 1865 and 1870, the five years immediately following the Civil War. The last time the Constitution had been amended was with the Twelfth Amendment more than 60 years earlier in 1804. The Reconstruction amendments were important in implementing the Reconstruction of the American South after the war. Their proponents saw them as transforming the United States from a country that was (in Abraham Lincoln's words) "half slave and half free" to one in which the constitutionally guaranteed "blessings of liberty" would be extended to the entire populace, including the former slaves and their descendants.

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The Radical Republicans were a faction of American politicians within the Republican Party of the United States from around 1854, by the conservative Republicans, and the largely pro-slavery and later anti-Reconstruction Democratic Party, as well as by conservatives in the South and liberals in the North during Reconstruction. Radicals led efforts after the war to establish civil rights for former slaves and fully implement emancipation. After weaker measures resulted in 1866 violence against former slaves in the rebel states, Radicals pushed the 14th Amendment and statutory protections through Congress. They disfavored allowing ex-Confederates officers to retake political power in the south, and emphasized equality, civil rights, and voting rights for the "freedmen" (recently freed slaves).

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The Civil Rights Act of 1875 sometimes called Enforcement Act or Force Act, was a United States federal law enacted during the Reconstruction Era in response to civil rights violations to African Americans, "to protect all citizens in their civil and legal rights", giving them equal treatment in public accommodations, public transportation, and to prohibit exclusion from jury service. The bill was passed by the 43rd United States Congress and signed into law by President Ulysses S. Grant on March 1, 1875. The law was generally opposed by public opinion, but blacks did favor it. It was not effectively enforced and historian William Gillette says the passage of the law was an "insignificant victory." Eight years later, the Supreme Court ruled in Civil Rights Cases (1883) that the public accommodation sections of the act were unconstitutional.

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The Bureau of Refugees, Freedmen, and Abandoned Lands, usually referred to as simply the Freedmen's Bureau, was an agency of the United States Department of War to "direct such issues of provisions, clothing, and fuel, as he may deem needful for the immediate and temporary shelter and supply of destitute and suffering refugees and freedmen and their wives and children."

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In the history of the United States, a carpetbagger was a Northerner who moved to the South after the American Civil War during the Reconstruction era (1863–1877). Many white Southerners denounced them, fearing they would loot and plunder the defeated South and be politically allied with the Radical Republicans. Sixty men from the North, including educated free blacks and slaves who had escaped to the North and returned South after the war, were elected as Republicans to Congress.

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In United States history, scalawags were southern whites who supported Reconstruction and the Republican Party, after the American Civil War.

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The Fugitive Slave Acts were a pair of federal laws that allowed for the capture and return of runaway slaves within the territory of the United States. Enacted by Congress in 1793, the first Fugitive Slave Act authorized local governments to seize and return escaped slaves to their owners and imposed penalties on anyone who aided in their flight. Widespread resistance to the 1793 law later led to the passage of the Fugitive Slave Act of 1850, which added further provisions regarding runaways and levied even harsher punishments for interfering in their capture. The Fugitive Slave Acts were among the most controversial laws of the early 19th century, and many Northern states passed special legislation in an attempt to circumvent them. Both laws were formally repealed by an act of Congress in 1864.

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The Emancipation Proclamation, or Proclamation 95, was a presidential proclamation and executive order issued by President Abraham Lincoln on January 1, 1863. It changed the federal legal status of more than 3 million enslaved people in the designated areas of the South from slave to free. As soon as a slave escaped the control of the Confederate government, by running away or through advances of federal troops, the slave became legally free.

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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. The battle involved the largest number of casualties of the entire war and is often described as the war's turning point. Union Maj. Gen. George Meade's Army of the Potomac defeated attacks by Confederate Gen. Robert E. Lee's Army of Northern Virginia, halting Lee's invasion of the North.

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In the mid-19th century, scholars identified "total war" as a separate class of warfare. In a total war, to an extent inapplicable in less total conflicts, the differentiation between combatants and non-combatants diminishes and sometimes it even vanishes entirely because opposing sides can consider nearly every human resource, even that of non-combatants, to be a part of the war effort.

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The Anaconda Plan is the name applied to a U.S. Union Army outline strategy for suppressing the Confederacy at the beginning of the American Civil War. Proposed by General-in-Chief Winfield Scott, the plan emphasized a Union blockade of the Southern ports, and called for an advance down the Mississippi River to cut the South in two. Because the blockade would be rather passive, it was widely derided by a vociferous faction of Union generals who wanted a more vigorous prosecution of the war, and who likened it to the coils of an anaconda suffocating its victim. The snake image caught on, giving the proposal its popular name.

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Fort Sumter is a sea fort in Charleston, South Carolina, notable for two battles of the American Civil War. It was one of a number of special forts planned after the War of 1812, combining high walls and heavy masonry, and classified as Third System, as a grade of structural integrity. Work started in 1829, but was incomplete by 1860, when South Carolina seceded from the Union.

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Uncle Tom's Cabin was the best-selling novel of the 19th century and the second best-selling book of that century, following the Bible. It is credited with helping fuel the abolitionist cause in the 1850s.  In 1855, three years after it was published, it was called "the most popular novel of our day.

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On the evening of October 16, 1859 John Brown, a staunch abolitionist, and a group of his supporters left their farmhouse hide-out en route to Harpers Ferry. Descending upon the town in the early hours of October 17th, Brown and his men captured prominent citizens and seized the federal armory and arsenal.  Brown had hopes that the local slave population would join the raid and through the raid’s success weapons would be supplied to slaves and freedom fighters throughout the country; this was not to be. First held down by the local militia in the late morning of the 17th, Brown took refuge in the arsenal’s engine house. However, this sanctuary from the fire storm did not last long, when in the late afternoon US Marines under Colonel Robert E. Lee arrived and stormed the engine house, killing many of the raiders and capturing Brown. Brown was quickly placed on trial and charged with treason against the state of Virginia, murder, and slave insurrection. Brown was sentenced to death for his crimes and hanged on December 2, 1859.

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The Kansas–Nebraska Act of 1854 created the territories of Kansas and Nebraska and was drafted by Democratic Senator Stephen A. Douglas of Illinois and President Franklin Pierce. The initial purpose of the Kansas–Nebraska Act was to open up thousands of new farms and make feasible a Midwestern Transcontinental Railroad. The popular sovereignty clause of the law led pro- and anti-slavery elements to flood into Kansas with the goal of voting slavery up or down, resulting in Bleeding Kansas.

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The Missouri Compromise is the title generally attached to the legislation passed by the 16th United States Congress on May 8, 1820. The measures provided for the admission of the District of Maine as a state free to ratify a state constitution that neither recognized nor permitted slavery within the state.

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Popular sovereignty, or the sovereignty of the people's rule, is the principle that the authority of a state and its government is created and sustained by the consent of its people, through their elected representatives (Rule by the People), who are the source of all political power. The people have the final say in government decisions.

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Dred Scott v. Sandford, (1857), 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. It held that "a negro, whose ancestors were imported into [the U.S.], and sold as slaves", whether enslaved or free, could not be an American citizen and therefore had no standing to sue in federal court, and that the federal government had no power to regulate slavery in the federal territories acquired after the creation of the United States.

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Sectionalism in 1800s America refers to the different lifestyles, social structures, customs, and political values of the North and the South. It increased steadily in 1800–1850 as the North industrialized, urbanized and built prosperous factories, while the deep South concentrated on plantation agriculture based on slave labor, together with subsistence farming for poor whites who owned no slaves. Southerners defended slavery in part by claiming that Northern factory workers toiled under worse conditions and were not cared for by their employers. Defenders of slavery referred to factory workers as the "white slaves of the North".

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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 on the status of territories acquired during the Mexican–American War(1846–1848).
Before the compromise

Territorial results of the Compromise