Fallen angels by Walter Dean Myers why are Richie peewee jenkins Johnson and lobel in Vietnam?

In _Fallen Angels_ by Walter Dean Myers, Richie Perry, Peewee, Jenkins, and Talon (not Lobel) are in Vietnam because they were drafted into the Vietnam War. As young Black men, they faced institutional racism within the military and society at large. Themes of racial inequality and the personal struggles of soldiers during wartime are central to the novel.