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After the American Revolution, America got Great Britain's land from the Appalachian Mountains to the Mississippi River. This event is what gave us the land that would go to the North and become part of the free land.

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Congress had the territory won from Britain after the Revolutionary War. The Northwest Ordinance was created to establish a government and create five or six new states from the territory. They created part or all of the states Ohio, Indiana, Illinois, Wisconsin, Michigan, and Minnesota. This led to the Civil War because these new states were declared free states and weren't open to slavery, which the South didn't like.

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The three-fifth compromise gives the South extra representation in the House of Representatives and Electoral Colleges. The compromise states that three-fifths of the enslaved population would be counted in the population for the House of Representatives. The North didn't like this because it gave the South higher political power. Or they wanted the slave population to be counted in full so that the South would have higher taxes because of a higher population.

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The cotton gin was really important because it increased the demand for enslaved people. It is a machine that quickly and easily separates cotton fibers from the seeds. This made the demand for slaves grow because slave owners could make money much faster if they had lots of slaves working lots of these machines. This led to there being more slaves in the South and more slaves being imported into the U.S.

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President Thomas Jefferson wanted New Orleans because there was a big port there where a lot of America's imports and exports passed through. He started negotiations with France and in 1803 he acquired the Louisiana Territory.
This event led to the Civil War because it was the land that a bunch of people fought over the land and tried to make it either pro or anti slavery land.

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After Thomas Jefferson purchased the Louisiana Territory, he needed someone to go explore it and see what is inside. He assembled an expedition to explore and document the new land. Leading the expedition were Meriwether Lewis and William Clark. Starting at St. Charles, Missouri on May 14, 1804 they traveled west, following the Missouri River and documenting all that they found. Over the span of two years, they traveled more than 8,000 miles from Missouri to the Pacific Ocean and back. The purpose of this journey was to find a waterway that leads to the Pacific (which doesn't exist), document all of the animals and plants found along the way, and establish peaceful connections with the natives in the area.
This event led to the Civil War because the North and the South both fought over whether the land would have slavery or not slavery. It was also the land that the Missouri Compromise was created for.

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Due to the Slave Trade Clause in the Constitution, Congress could ban the Trans Atlantic Slave Trade for 20 years. So in 1807, with a population of over 4 million enslaved people in the South, a few Southern Congressmen joined the Northern Congressmen in abolishing the African Slave Trade. The act became effective on January 1, 1808. This was a key event because now no more slaves were being transported into the U.S. and we just had the slaves that were already here.

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This clause gave the Executive the power and duty to suppress all riots and insurrections made by the enslaved people to maintain the law and order of the country.
This event led to the Civil War because it made the North upset that the slaves couldn't protest or stand up for themselves.

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Spain was already fighting revolutionaries inside their country so when America attacked they couldn't stop us. Instead they gave us Florida and we gave them $10 million dollars in return. This lead up to the civil war because Florida was part of the slave territory and gave the North more land to fight with the South for.

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The Missouri Compromise was created to settle the debate in Congress over slave and free states. The compromise stated that Missouri would be added as a slave state while Maine (which was currently part of Massachusetts) would become a free state. An invisible line would also be drawn across the Louisiana Territory. New states added above the line would be part of the North, and free states, while states added below the line would become part of the South, and the slave states. The North was worried about any more new territory becoming a slavery territory and vice versa for the South. So they both wanted all the territories to be on their side which just increased problems.

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Denmark Vesey was an American Carpenter who was accused and convicted of being the leader of "the rising." He was executed on July 2. Denmark became a martyr for African-Americans and fueled the growing abolitionist movement while the increasingly aggressive politics of the white population dragged the country toward the Civil War.

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Nathanial Turner was an enslaved man who led a rebellion of enslaved people on August 21, 1831. His actions set off a massacre of about 200 black people and a new wave of oppressive actions that stopped the education, movement, and assembly of enslaved people. However, the rebels also killed around 55 to 65 people, about 51 of whom were white. This led to more arguments in Congress about slavery and eventually the Civil War.

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After Texas won its independence from Mexico, it applied to join the U.S. When we denied the request, Texas threatened to join Great Britain instead so we annexed Texas.
This event led to the Civil War because Congress then had to decide whether to let it be a slave state or a free state.

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The idea of Manifest Destiny was created by Journalist John L. O'Sullivan as he was describing the American journey moving west. The term took hold and soon most Americans believed it was their right and destiny to expand into the "unsettled" territories. This event led to the Civil War because this idea made people explore new lands and take over them, so people then had to decide whether to allow slavery or not.

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We negotiated to divide Oregon COuntry with Great Britain. We claimed the Southern half and Britain got the Northern half which is now part of Canada.
This event led to the Civil War because it added some more land for the North and the South to fight over.

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After declaring war on New Mexico and winning, we acquired the Mexican Cession as well as paying Mexico $15 million for it to make it fair.
This event led to the Civil War because the North and South fought over who got what and some of the states included were decided by popular sovereignty which was a very violent and bad way to decide cause not everyone would want the result.

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In 1846, a war with Mexico broke out, and even though we won, Congress still had to decide whether to allow slavery in the new land. Both the North and the South wanted the land to be part of their side. The compromise stated that California would be added as a free state and the slave trade in Washington D.C. would end. For the South, the Fugitive Slave Act was passed and made it easier for slave owners to find and take back the enslaved people that ran away from them. The territory won from the Mexican War was divided into two territories - New Mexico and Utah - both would decide whether to allow slavery or not by popular sovereignty. Popular sovereignty just increased the violence in states since not everyone wanted slavery or not everyone wanted to be a free state. This violence eventually split the country with our Civil War.

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This act made it easier for slaveholders to find and take back runaway slaves that had escaped. This made the North angry because now they couldn't hide and protect runaway slaves. This led to the Civil War because the North was mad it couldn't protect the slaves and the South was mad that the North was trying to keep their slaves and it just increased the conflicts and tensions between the two sides.

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We wanted a level route to the west coast so we decided to negotiate with Mexico to see if they were willing to give us part of their land. We spent $10 million on a little strip of land near Texas and is part of New Mexico now. This event led to the Civil War because it was part of Arizona and New Mexico, and they had opposite opinions about slavery which just increased conflicts and tensions.

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In 1854, Senator Stephen Douglas proposed dividing the land into two areas - Kansas and Nebraska - and the two states would decide whether to allow slavery or not by popular sovereignty. When the act was passed,lots of pro and anti-slavery settlers rushed into Kansas to make their voices heard about their positions on slavery. In doing so, two governments were set up, one pro-slavery and one anti-slavery. Because of the violence that broke out between the two sides, Kansas became known as bleeding Kansas. On May 21, 1856, over 700 pro-slavery "border ruffians" attacked the anti-slavery town of Lawrence. This made tensions between the South and North grow until they just decided to split and it led to the Civil War.