Early American Discrimination Timeline By kiannerallen May 26, 1637 Massacre at Mystic Aug 21, 1831 Nat Turner Rebellion 1857 Dred Scott Decision Jan 1, 1863 Emancipation Proclamation Jan 31, 1865 13th Amendment Jun 13, 1866 14th Amendment Feb 3, 1870 15th Amendment Apr 13, 1896 Plessy vs. Ferguson