Well, Like most it was probably Political, economic, and Military Strength. Theodora took after many with her empire, all wanting to build a civilization.
Check out wikipedia. The US exepts inmigrants from any country In the world.
The Senior U.S. Military Official are assigned to Korea has the responsibility to do the following;
- defend them in regards of acts involving external aggression
- deter against acts that involve external aggression
- they are likely to exercise oversight and providing coalition maintenance