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Mexico gained their independence from Spain, but in the war forced many people to flee their native Mexico.
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The immigration Act of 1917 was the first legislation limiting immigration Ito the United States. South American and Mexican Immigrants were especially affected
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An act that made the Puerto Ricans citizens of the United States, many of whom joined the army to fight in the first world war protecting the Panama Canal.
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Congress creates border control
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Prohibited Mexican Immigrants from crossing the border, many people detained and sent across the border
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Established the Bracero program
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Industrialization of Puerto Rico to help United States economy