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  1. › wiki › OklahomaOklahoma - Wikipedia

    Há 1 dia · The 20th century discovery of petroleum led to the development of a powerful oil industry. In the 1910s and 1920s, Oklahoma experience major instances of civil unrest with the Green Corn Rebellion and the Tulsa Race Massacre. In the 1930s, the Dust Bowl led to mass emigration from the state.