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poloitical: the contential congress suggest the colonies to start forming their own governments and rule themeselves Date: no specific day and month
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political
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political no specific day
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innovation
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Expansion
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Expansion Date: it was in may, but no specific day
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expansion
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slavery
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innovation Date: relating to the justification of the war with mexico
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slavery
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social
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social
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innovation date: 1850-1860 the height of the usage of the underground railroad