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In page Timeline of African-American history:

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1916

  • Los Angeles hires the country's first black female police officer.[citation needed]
  • The Great Migration begins and lasts until 1940. Approximately one and a half million African Americans move from the Southern United States to the North and Midwest. More than five million migrate in the Second Great Migration from 1940 to 1970, which includes more destinations in California and the West.[citation needed]