The United States ratified the 14th Amendment to allow former slaves citizenship in the US.
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The Yellowstone National Park Protection Act went into law, making it the first National Park in the world.
The Naval Act of 1938 passed in United States legislation.
President Franklin D. Roosevelt signed Tennessee Valley Act to build dams.
The legal age required for voting in the USA was reduced to 18.
US President Rutherford B. Hayes signed a bill allowing female attorneys to argue cases before the Supreme Court.
