What does rome and greece have in common

The economy of ancient cultures, including both Greece and Rome, were based on agriculture. Greeks ideally lived on small self-sufficient wheat-producing farms, but bad agricultural practices made many households incapable of feeding themselves. Big estates took over, producing wine and olive oil, which were also the chief exports of the Romans—not too surprisingly, given their shared geographical conditions and the popularity of these two necessities.

in 1897, pershing became a tactical officer at west point, and that's where he was given the nickname "black jack." pershing's first name is "john," for which "jack" is a nickname, and he was a white man who commanded black troops. hence "black jack".