Memphis massacre of 1866, in the U.S. post-Civil War period, a brutal and unprovoked attack by a white mob on Black residents of Memphis, Tennessee, occurring a little more than a year after the Confederate surrender. Acting over several days, from May 1 to 3, the mob murdered 46 African Americans (most of whom were Union veterans) and wounded more than 75 others, including 5 Black women who were raped. The mob burned 50–90 homes and about a dozen Black churches and schools. The horrific violence demonstrated Southern intransigence in the face of defeat and indicated whites’ unwillingness to share civil or social rights with the newly freed African Americans. The event aroused sympathy in the U.S. Congress for the plight of African Americans in the South, drawing attention to the need for legal safeguards on their behalf and thus leading to Congress’s submission (June 16, 1866) to the states for ratification of the Fourteenth Amendment to the U.S. Constitution (ratified July 9, 1868). The events in Memphis marked the first large-scale racial massacre to occur during the tumultuous Reconstruction era; they were followed shortly by the New Orleans massacre of July 30, 1866.