Satraps were appointed to govern the provinces.
Darius I made use of good ideas from the lands he conquered.<span> </span>
If im not mistaken i was Greece that influenced most of Romes culture :)<span />
It would make the group feel more connected to it's roots and they would strive for excellence together.
B. It was to aid Europe after WWII
Because there were so many japanese people they could conquer someplace then then a couple of troops behind to colonise and guard.
