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Arizona becomes U.S. territory, granting citizenship to many former Mexican residents.
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The U.S. acquires southern Arizona from Mexico, further increasing Arizona’s Mexican heritage and population.
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Thousands of Mexicans flee violence and settle in Arizona, shaping its demographics.
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The U.S. Border Patrol is created, with significant operations focused along the Arizona-Mexico border.
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Mexican laborers come to Arizona as temporary farm workers, impacting the state’s agriculture and labor force.
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Large-scale federal deportations of undocumented Mexican immigrants include many in Arizona.
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Arizona becomes a resettlement site for Southeast Asian refugees after the Vietnam War.
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Arizona sees increased migration and asylum claims from Central Americans fleeing violence.
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Many Arizona immigrants gain legal status through federal amnesty provisions.
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Economic changes increase migration through Arizona’s border areas.
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Arizona voters require proof of citizenship for voting and public benefits, directly affecting immigrants.
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Arizona sees new sections of border wall/fencing, changing migration patterns.
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Arizona passes one of the strictest state anti-illegal immigration laws in the country.
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The U.S. Supreme Court strikes down parts of SB 1070, but upholds the "show me your papers" provision.
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Arizona remains at the center of national debates on asylum, border security, and migrant humanitarian aid, with ongoing controversies over enforcement and treatment of migrants.