Answer:
The most ancient China civilization was located with the Yellow River to the north and the Yangtze to the southern.
People are prideful of their nation. Nationalism is a way of explaining or putting in words how much some people really love their country. Some people love their country so much... they made a war. it honestly like that...everyone spent Billions of dollars. just to prove they were better and lost.
Because it has grown so vast that it was no longer feasible to govern all the provinces from the seat of Rome.
