Answer:
US keeps bases in Japan and Japan can have bases in the US, and both countries will keep peace with eachother.
Explanation:
history
Steel was manufactured much faster and henceforth railways and such could be constructed much faster.
During the renaissance period, the kingdom that ruled upon a certain region has a centralized power which make the main kingdom had the right to determine whatever regulations or political decisions that should be made by the cities.
Kingdoms of Western europe use more of a decentralized power and give the cities enough freedom to regulate themselves.