The United States ratified the 14th Amendment to allow former slaves citizenship in the US.
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Maryland passed its first anti-amalgamation law.
The Vietnam War officially ended, for the US at least, after the Paris Peace Accords were signed.
The US Supreme Court ruled that school is for everyone and banned discrimination based on citizenship.
The Outer Space Treaty was signed to prevent the use of nuclear weapons being utilized in space.
President Donald Trump banned citizens of seven countries from entering the US.
