A royal colony is the definition of the answer.
Germany failed to take over Europe
Italy failed to gain land in Europe
Austria-Hungary failed to keep stable, now they don't exist.
Bulgaria failed to gain the land they wanted
Turkey failed to get back at Russia for the *Crimean Wars
*could be a different war not sure
Well-known and a good character
The executive department that deals most with foreign countries is the "State Department", which is headed by the Secretary of State--a position that is appointed by the President.
So that the really important cases can be addressed by good judges (at lack for better words) and maybe change a law (Rosa parks case). And lesser ones be taken care of fast.