He knows by the way their head is tilted. :D
The mandate system was a mechanism set up by the League of Nations after WW1, allowing the victorious powers to govern enemy colonies until the natives were fit to rule themselves. The colonies were called 'mandates', while the country ruling it was referred to as the 'mandatary'.
He was the king of Prussia at the time. And he made the gaverment more efficient. Which meant more power for him.... so self center. lol