What were the differences in roles of African Americans during WW1 and WW2?

Answer 1

None. In both they were still oppressed people fighting on behalf of a country that treated the non-Black enemy better than it treated them. Even as late as WW2, German/Nazi soldiers were able to eat first rations at tables alongside Caucasian American soldiers, while the ***** soldiers were in lesser quarters eating spoils and left overs.

Answer 2

They did a little more fighting in WW2, but they were segregated into their own companies and such. In the Vietnam War they fought side by side with white soldiers and were pretty well accepted by then. Except when they returned to the states where no military got a good reception at home.