Red Summer: Race riots erupted in Chicago after a racial incident occurred on a South Side beach, leading to 38 fatalities and 537 injuries.

The Red Summer was a period in mid-1919 during which white supremacist terrorism and racial riots occurred in more than three dozen cities across the United States, and in one rural county in Arkansas. The term "Red Summer" was coined by civil rights activist and author James Weldon Johnson, who had been employed as a field secretary by the National Association for the Advancement of Colored People (NAACP) since 1916. In 1919, he organized peaceful protests against the racial violence.

The Chicago race riot of 1919 was a violent racial conflict between white Americans and black Americans that began on the South Side of Chicago, Illinois, on July 27 and ended on August 3, 1919. During the riot, 38 people died. Over the week, injuries attributed to the episodic confrontations stood at 537, two-thirds black and one-third white; and between 1,000 and 2,000 residents, most of them black, lost their homes. Due to its sustained violence and widespread economic impact, it is considered the worst of the scores of riots and civil disturbances across the United States during the "Red Summer" of 1919, so named because of its racial and labor violence. It was also one of the worst riots in the history of Illinois.

The South Side is one of the three major sections of the city of Chicago, Illinois, United States. Geographically, it is the largest of the sections of the city, with the other two being the North and West Sides. It radiates and lies south of the city's downtown area, the Chicago Loop.