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This is when the Oto tribe gave land to the US a little bit after the Lewis and Clark expedition. It was to keep the settlers safe from the Indians.
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In this act, basically anyone who has been using some land for a while, but doesn't own it can buy the land for really cheap as long as they are 21, a US citizen, and are a head of a household.
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This made Kansas and Nebraska territories. It got rid of the Missouri Compromise, which said no slavery below 36' 30'. This meant that Nebraska and Kansas could be free or slave states.
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This was a war between the North and South over slavery. The North didn't want slavery, but the South did. So, they fought over it.
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The Homestead Act let the people come in and buy up to 160 acres of land for really cheap. This made more people come to Nebraska.
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This act gave the states land to sell so the states could afford to build public schools.
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This is when the US gave up land so that the people could build railroads.
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This is when the Union Pacific and Central Pacific Railroad Company built toward each other to make the first ever transcontinental railroad in the US.
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This is when the US army attacked a bunch of innocent Indians near Sand Creek, killing 160 men, women, children, and infants.
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This is when there were some Indians that killed 13 dudes off of a wagon train and took two people captive.
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This is the day that the US decided to add in the US to the rest of the country.
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This made some of the land that is in South Dakota belong to the Indian tribes.
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This treaty was actually made with several different tribes, not just the Lakota. The Lakota was the main area of the tribes, though.