The Tulsa race massacre was a two-day-long terrorist massacre perpetrated by white supremacists that took place in the Greenwood District of Tulsa, Oklahoma, United States, between May 31 and June 1, 1921. Mobs of white residents, some of whom had been armed and appointed as deputies by city government officials, attacked black residents and their homes and businesses. The attackers burned and destroyed more than 35 square blocks of the neighborhood—at the time, one of the wealthiest black communities in the United States, colloquially known as "Black Wall Street." The event is considered one of the worst incidents of racial violence in American history.