When did the American Civil War end?
The American Civil War formally concluded on August 20, 1866 when President Andrew Johnson issued a proclamation declaring that civil authority was restored in all of the states.
<START_INST>When did the American Civil War end?<END_INST><START_CTX><END_CTX><START_A>The American Civil War formally concluded on August 20, 1866 when President Andrew Johnson issued a proclamation declaring that civil authority was restored in all of the states.<END_A>