American Civil War: The <a href="https://en.wikipedia.org/wiki/District_of_Columbia_Compensated_Emancipation_Act" id="mwfQ" rel="mw:WikiLink" title="District of Columbia Compensated Emancipation Act">District of Columbia Compensated Emancipation Act</a>, a bill ending <a href="https://en.wikipedia.org/wiki/Slavery_in_the_District_of_Columbia" id="mwfg" rel="mw:WikiLink" title="Slavery in the District of Columbia">slavery in the District of Columbia</a>, becomes law.