How long had the United States and Japan been at peace?

Explanation:The U.S.-Japan Security Treaty has lasted longer than any other alliance between two great powers formed after the 1648 Peace of Westphalia. The treaty had a minimum term of 10 years but provided that it would remain in force indefinitely unless one party gives one year's notice of wishing to terminate it.

        i'm fairly sure that the correct answers are 2 and 3.

        i used both my knowledge of world history and the process of elimination to obtain these answers. option 1 cannot be a possible selection because the mandate of heaven belongs to ancient chinese philosophical belief. option 4 sounds like it would benefit the region than detriment it. however, both 2 and 3 explain a potential reason for what could have contributed to the fall of the roman empire.

      hope this ! if i were you, i'd get a second opinion, because i haven't taken this course for a year. best of luck!

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