“The Tulsa Race Massacre, sometimes referred to as the Tulsa race riots, began in May 1921 after a black teenager named Dick Rowland was falsely accused of having assaulted a white woman.” NBC News: Possible mass grave from 1921 Tulsa Race Massacre found by researchers. This deadly, but often forgotten, chapter in American history has been brought back to the forefront by Damon Lindelof and his HBO series, Watchmen, which is tremendous.