Reconstruction Era By astrom Apr 15, 1865 President Gets Killed Abraham Lincoln gets assassinated by John Wilks Booth. Dec 6, 1865 13th Ammendment Was approved. Dec 9, 1865 Black Codes Became a law. Mar 2, 1867 Reconstruction Act Begins. Jul 9, 1868 14th Ammendment Becomes approved. Mar 3, 1870 15th Ammendment Becomes approved. Nov 20, 1877 Reconstruction Ends After 12 years of failure, they gave up.