The riot began on June 20, 1943, on Belle Isle (one of the world's largest parks) when roughly one hundred thousand Detroiters gathered to enjoy the hot Sunday afternoon. Hostile confrontations between young blacks and whites broke out throughout the day, and fights erupted on the bridge connecting Belle Isle to Southeast Detroit. Rumors of race war roused whites and blacks, who both took to the streets near Belle Isle and in the downtown area and attacked passersby, streetcars, and property. Blacks in Paradise Valley (“Black Bottom”) looted white-owned shops; whites overturned and burned cars of black drivers on Woodward Avenue. According to Thomas Sugrue in The Origins of the Urban Crisis: "Many Detroit police openly sympathized with the white rioters, and were especially brutal to the blacks; 17 blacks were shot to death by the police, no whites were" (p. 29).
The riot came to an end once Mayor Edward Jeffries, Jr. and Governor Harry Kelly asked President Roosevelt for help. In response, federal troops in armored cars and jeeps with automatic weapons drove down Woodward Avenue. The appearance of the troops with their overwhelming firepower succeeded in dispersing the mobs. Over the course of three days, 34 people were killed, of whom 25 were black. 675 suffered serious injuries, and 1,893 were arrested.