20 Important Events Between 1865 and 1912 By pjleone Apr 11, 1865 13th Amentment passed Apr 11, 1866 Buffalo Soldiers Apr 11, 1868 Grange Movement Apr 11, 1868 traffic lights Traffic lights invented Apr 11, 1870 Standard oil Apr 11, 1872 YellowStore Apr 11, 1879 Thomas Edison Lightbulb