What was true about african americans in the military

What is zinn's approach to the study of history? what does he suggest occurs when history is told is the story of human progress?

It can be inferred that the dramatic increase in defense spending by germany was the result of. (a) attempts by great britain to take german colonies. ( b) fear of a two-front war against france and russia (c) the need to put down a communist rebellion (d) a competition with the allies to produce atomic weapons

56: 58 the assembly line was a system through which items were mass-produced in a flow.