World War 2; was it about Empire?

was World war two really about moral issues or were their other motives for the conflict?

Listening to Black-oriented talk radio this Sunday morning, some of the callers voiced their dismay at the fact that President Trump made no mention of the sacrifices made by Black Soldiers.

Blacks served during the war because Black leaders appealed to the White Political Establishment to allow the Black Community to fight the enemies of America in exchange for greater “Civil Rights.”

The question then, as it is now is; was all of the underlying causes fully understood by the Black Community at the time?

Was the trade-off worth the sacrifice?