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1783 - Great Britain gives up Northwest Territory after losing The Revolutionary War

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1783 - Great Britain gives up Northwest Territory after losing The Revolutionary War

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After losing the war Great Britain leaves the area and gives up the territory North of the 13 colonies.
This is a key event since after the colonies received this area debate over if people that live here could own slaves arose and slaves were the reason behind the Civil War.

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The Cotton Gin was an invention that could clean seeds from cotton very quickly. It allowed cotton to be made and sold a lot quicker and caused slavery to grow. This was key since it was bad for slavery to grow and the free states saw it growing as a bad thing.

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The 3/5 compromise was a compromise in which slaves would count as 3/5 a free man towards the state's total population. They did this to determine the number of seats in the House of Representatives and the amount needed to be paid for taxes by each state.
This was key since it started to make tensions grow between northerners and southerners.

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1800 - France receives the Louisiana Territory from Spain

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1800 - France receives the Louisiana Territory from Spain

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France acquired the Louisiana Territory from Spain shortly after signing a peace treaty with the United States.
This is a key event since debate around slaves in the area arose and if people could own the. The debate over slaves was the reason behind the Civil War.

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1801 - Thomas Jefferson is elected President

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1801 - Thomas Jefferson is elected President

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Thomas Jefferson is elected and takes office.
This is a key event since he is president around the time slaves are started to be discussed around the country and this helps lead to the Civil War.

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Thomas Jefferson buys the Louisiana purchase.
This is a key event since this started debated over slaves in these new territories which lead them to the Civil War.

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1804 - Lewis, Clark, and the Corps of Discovery set out on a historic 8,000-mile journey 

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1804 - Lewis, Clark, and the Corps of Discovery set out on a historic 8,000-mile journey 

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Thomas Jefferson sent these men out to discover a possible waterway to the pacific, note flora and fauna, map out the territory of the Louisiana Purchase, and make peace and trade with the Native Americans.
This is key since the area explored would eventually become states who have to decide to be a Free or Slave state

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1806 - Lewis, Clark, and the Corps of Discovery return to their start point after 2 years

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1806 - Lewis, Clark, and the Corps of Discovery return to their start point after 2 years

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After returning they report to Thomas Jefferson that there is no waterway, they made trade with the Natives and explored the area's boundaries as long as plants and animals.
This is key since the area they explored would eventually become states who have to decide to be a Free or Slave state

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The land above the Louisiana Purchase is in the Green.

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1818 - The land above the Louisiana Purchase

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1818 - The land above the Louisiana Purchase

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Great Britain and the American government both wanted land above the Louisiana Territory so Great Britain gave them a small portion of land on the Canadian border.
This is key since this area later became Minnesota and they became a free state and disapproved slaves in the Civil War..

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James Monroe purchased Florida from Spain for $5 million.
This is a key event since Florida became a slave state and supported slaves in the Civil War.

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Missouri middle in red, Maine top right in blue.

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In 1820 Missouri wanted to be admitted into the union as a slave state but that would throw off the balance between slave and free states. So they agreed to make missouri a slave state but Maine would turn to a Free state to make it a 50/50 again.
This is important since it made the balance between the free and slaves states equal so no one was really that mad.

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Texas which was a part of Mexico at the time declared independence from Mexico. They later fought and Texas won independence and became a part of the U.S.
This is important since Texas later became a slave state and supported slavery in the Civil War.

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The Oregon Territory was the territory of now day Washington, Oregon, Idaho, and parts of Montana and Wyoming. The British gained land north of the parallel and the United States received the territory south of the parallel.
This is important since these areas

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The Mexican army invaded the United States soil and on May 13, 1846, Congress declared war on Mexico. This area makes up the states of California, Arizona, Nevada, New Mexico, Utah, and parts of Colorado and Wyoming.
This is important since some of these states would've help expand slavery and some would later help in the Civil War.

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The compromise of 1850 allowed California to enter the Union as a free state, ended the slave trade in Washington D.C., made a strict fugitive slave law, and allowed some new states to decided slavery for themselves.
This was important since if states got to decided slavery for themselves it might throw the balance off.

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Uncle Tom's Cabin was a book written by Harriet Beecher to show unenslaved people what being a slave was really like. It had a huge impact on people especially people living in free states and is a book reconsigned by people like Abraham Lincoln for it being a key event that led to the start of the Civil War.

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The Gadsden Purchase was an agreement between the United States and Mexico where the U.S. paid $10 million to buy a small portion of Mexico.
This is important since the area bought later became parts of New Mexico and Arizona where New Mexico supported slavery and Arizona abolished it.

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This created Kansas and Nebraska as territories as well as allowed settlers to decided slavery in these new territories. This act also removed the Missouri Compromise.
This is important since removing the Missouri Compromise would have been unfair towards the Slave States and might throw off balance.

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Bleeding Kansas was a very small civil war held in just Kansas. Pro vs. Anti Slavery advocates would fight for control of the territory and control of popular sovereignty. This is important since it was a

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1860 - Abraham Lincoln is elected president

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1860 - Abraham Lincoln is elected president

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Abraham is elected president in 1860 a very controversial vote since slave states thought he was going to end slavery. After being elected 7 slave states would leave the Union and only a couple of months later we would enter The Civil War. This is important since Abraham being elected is why the Union split and later caused the war.