Racial violence in the Reconstruction period took three major forms: riots against Black political authority, interpersonal fights, and organized vigilante groups. There were riots in southern cities several times during Reconstruction. The most notable were the riots in Memphis and New Orleans in 1866, but other large-scale urban conflicts erupted in places including Laurens, South Carolina, in 1870; Colfax, Louisiana, in 1873; another in New Orleans in 1874; Yazoo City, Mississippi, in 1875; and Hamburg, South Carolina, in 1876.