What jobs did African Americans have prior to World War II?

Explanation:

2686-2181 bce-- "egyptian civilization developed along the nile river in large part because the river’s annual flooding ensured reliable, rich soil for growing crops."

1069-664 bce-- "ancient egyptians developed wide-reaching trade networks along the nile, in the red sea, and in the near east."

a big one is

to appoint and regulate officers of the land and naval forces,

which caused much controversy ending the articles