A great text is Joseph T. Wilson's The Black Phalanx. It's a history of black troops in the Revolution, the War of 1812, and the Civil War. Wilson was in the 54th Massachusetts, and after the war interviewed every black soldier and his commander that he could find, as well as doing exhaustive research on black troops in US forces. But, because the book is so very densely written in the style of the emphatic, didactic late 19th century History teacher, most folks wouldn't be able to finish it.
Another good book is The Black Swallow of Death, about the first black aviator, Eugene Bullard. Bullard was from Georgia, and flew in the Lafayette Escadrille. He shot down a couple of German machines, and led an extremely colorful life. He spoke French and German, and during WWII spied on the Germans. He was finally fingered for the Gestapo. He made it back to the USA by the skin of his teeth, shot up pretty badly. He got the Croix de Guerre for his efforts.
The trouble is that none of these seriously tough hombres are of any interest to today's students, as they were extremely patriotic and some seriously bad dudes in uniform.