Answer:
City-state, a political system consisting of an independent city having sovereignty over contiguous territory and serving as a centre and leader of political, economic, and cultural life.
(I don't know how it spreaded though, sorry :<)
Debris seems like it fits well <span />
They were all run by confucianism
Answer:
the bell aircraft employed almost 30.000 locals. Thats a very good benefit
Explanation: