When Diocletian realized that the empire was too big to run, he split the empire into four regions. This helped to restore order in the empire and also to reform it. His reign stabilized the empire and marked the end of the Crisis of the Third Century
It benefited in numerous ways but mainly it and maybe most importantly it gave them the access to the China trade. The Pacific route was also Spain's exclusively for a certain period of time and there was also a great need for silver in China which was supplied by the Spaniards from their silver mines.
Answer:
Rome became the most powerful state in the world by the first century BCE through a combination of military power, political flexibility, economic expansion, and more than a bit of good luck. This expansion changed the Mediterranean world and also changed Rome itself.
Because the US needed to honor its vow to defend Russia
