AP* GOV required cases By annan23 1857 Dred Scott v. Sandford the slave Dred Scott had escaped is owner and fled to a free state when he was taken back in to custody he argued that he had been a free man for to long to be taken back into slavery. Period: 1857 to 2015 AP* GOV Required cases Jan 31, 1865 13th Amendment Jul 9, 1868 The 14th Amendment Feb 3, 1870 The 15th Amendment