Why is Matthew Little’s work on the Civil Rights Movement considered a primary source?

joined the Minneapolis NAACP, soon became its president and for the next half-century played a pivotal role in many civil rights struggles that played out in Minnesota.

Explanation:

united states reinforcements contributed greatly to three allied victories in france at: cantigny (first major american battle), argonne (the largest in the united states military history, involving 1.2 million american soldiers), and château-thierry (one of the first actions under general pershing).