Believed to be the single worst incident of racial violence in American history, the bloody 1921 outbreak in Tulsa has continued to haunt Oklahomans. During the course of eighteen terrible hours on May 31 and June 1, 1921, more than one thousand homes and businesses were destroyed, while credible estimates of deaths range from fifty to three hundred. This took place in the Greenwood District; as one of the most prominent concentrations of African-American businesses in the United States during the early 20th century, it was popularly known as America’s “Black Wall Street”.