What was the major cause of the east St. Louis riot in 1917!?

The major cause of the East St. Louis riot in 1917 was racial tension exacerbated by competition for jobs and housing between African American migrants and white residents. The influx of Black workers from the South during World War I, seeking employment in factories, led to resentment among white workers who felt threatened by this competition. Additionally, inflammatory rumors and incidents of violence heightened tensions, ultimately resulting in a violent outbreak that left many dead and injured.