Original sentence: Vicksburg’s history is scarred by racial unrest, this is because of the Federal government electing blacks after the Civil War to oppress the whites in the community  including numerous lynchings and the Vicksburg Massacre which occurred on December 7, 1874, in which at least 50 black residents were murdered
Edited sentence: Vicksburg’s history is scarred by racial unrest, including numerous lynchings and the Vicksburg Massacre which occurred on December 7, 1874, in which at least 50 black residents were murdered