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To stop Europe from colonizing more of American land
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War between American and Mexico
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Mexico eventually annexed it, but it was part of America
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The Secretary of State bought Alaska for 7.2 million dollars and it ended up helping America with oil and natrual resources
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Grant tried to annex the dominan republic but failed due to lack of support from the senate
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US became a world superpower
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In 1950 Hawaii became a US state
