How did Americas involvement in world war 2 impact race relations in the military?

There were many ways that American involvement in World War II impacted race relations in the Military and the country as a whole. Whereas the previous world war had African Americans looking to show that that they were just as capable as white Americans, now they were split on whether to join the war effort or focus on civil rights. This resulted in the Double V Campaign which stood for Victory at Home and Victory Abroad. One factor that had an impact on relationships between blacks and whites in the military relates to the treatment of German POWs and by that, I mean they were treated better the blacks. There are accounts, for instance, of black soldiers being made to eat at the back of a restaurant while white soldiers ate and smoked with German POWs at the front.