Why is the Red Summer of 1919 significant/important?

The ink had barely dried on the Treaty of Versailles, which formally ended World War I, when recently returned black veterans grabbed their guns and stationed themselves on rooftops in black neighborhoods in Washington D.C., prepared to act as snipers in the case of mob violence in July of 1919. Others set up blockades around Howard University, a black intellectual hub, creating a protective ring around residents.

Explanation:

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the right answer for the question that is being asked and shown above is that: "their policy of "divide and rule" pitted political groups against each other to keep any one group from becoming too powerful.  " the  participant in european imperialism is being described below is that  their policy of "divide and rule" pitted political groups against each other to keep any one group from becoming too powerful.