The summer of 1919 in America was termed Red Summer because of a series of these events.
Anarchist bombings
Race riots
Wildfires
Labor strikes
Race riots. With the Great War over, building racial tensions bubbled over. More than 20 race riots occurred in U.S. cities and more in rural areas, resulting in a wave of lynchings of African Americans so widespread that black poet James Weldon Johnson called it the Red Summer.