+13af commonly references concepts related to the [Thirteenth Amendment](/wiki/Thirteenth_Amendment) to the United States Constitution. Ratified in 1865, this landmark amendment formally abolished [Slavery](/wiki/Slavery) and involuntary servitude across the nation. It stands as a cornerstone of American civil liberties.
+## See also
+- [Abolition](/wiki/Abolition)
+- [Civil Rights](/wiki/Civil_Rights)
+- [Constitutional Law](/wiki/Constitutional_Law)
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