The document references several key events and movements in 20th century African American history including the Great Migration, Harlem Renaissance, experiences of African Americans in WWII, segregation, the concept of the "New Negro", post-war economic growth, desegregation of the military, issues of lynching and violence, the role of black churches, the work of the NAACP, and the Supreme Court's Brown vs. Board of Education decision that declared segregation in public schools unconstitutional.