This is a fairly comprehensive book - replete with photos and personal accounts - of the history of African Americans in the U.S. military spanning from the War of Independence to Vietnam. The author also looks into the efforts made by the military in the post-Vietnam era to expand opportunities for advancement in the military for African Americans.
I recommend "THE RIGHT TO FIGHT: A History of African Americans in the Military" to any reader keen to know and better understand an aspect of U.S. history too often overlooked or marginalized.