Which best describes the red summer of 1919?

I think the red summer was when Communist was happening in Russia. The people in the U. S thought they were going to turn into communist. So people was very scared and opposed russians and communist supporters * "I think"

There were race riots all over America between May and October in about thirty cities, the bloodiest were in Elaine (Arkansas), Washington D. C and Chicago.

Explanation:

Labor Shortages: Industrial cities in the North and Midwest profited greatly from World War I. Yet, the factories also encountered serious labor shortages because white men were enlisting in World War I and the United States government halted immigration from Europe.

The Great Migration: To fulfill these job shortages, at least 500,000 African-Americans moved from the South to Northern and Midwestern cities. African-Americans were also leaving the South to escape Jim Crow laws, segregated schools, and lack of job opportunities.

Racial Strife: Working class white workers in Northern and Midwestern cities resented the presence of African-Americans, who were now competition for employment.