bc the league of nations didn't include America. That's why the Japanese didn't care bc not having America made them look less powerful. idk
North korea from it's establishment in 1948 to his death in 1994
I believe the three terms you are looking for is diplomatic, military, and economic ways.
Feudalism allowed large territories to be governed in the absence of a central government. Each lord or vassal raised an army to defend his fief and to serve the king as needed. One drawback to this system was that the nobles were very powerful because they controlled the armies.