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US congress bans the Importation of slavery
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Potatoe Famine in Ireland results in increased immigration to the US
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Offers 160 acres of free land to anyone who lives there for 5 years. Leads to a ruch of European immagrants
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The completion of the transcontinental railroad leads to easier travel across the US allowing for the immagrants to move further west
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The US bans immigration from China for the next ten years.
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Any woman married to an immagrant is forced to surrender their US citizenship.
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The US government introduces the "Green Card" system
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Offers Amnisty to illegal immagrants; makes it illegal for one to hire an illegal immigrant.
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Makes it harder for immigrants to seek refuge in the US
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Made in response to the (/11 attacks. requires a passport to leave and enter the US.
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makes it a crime (for illegal immigrants) to trespass in Arizona, making it the first state immigration law.
