AFRICAN AMERICANS IN THE GREAT WAR

African American Odyssey: World War I and Postwar Society  (Library of Congress)

African Americans and World War I (New York Public Library):  Includes a superb amount of information and an image gallery.

Scotts Official History of the American Negro in The World War

by Emmett J. Scott, Special Assistant to Secretary of War, copyright 1919. From the site listed directly above.  This is a full text copy of a book detailing the involvement of Black Americans in World War I.