The military achievements of the Assyrian empire

On the military front, they were able to conquer the entirety of Mesopotamia and were the first to use iron weapons. The Assyrians had the largest standing army in the history of Mesopotamia. They are also credited with the large-scale organization of their military into regular numbers and rankings.

Explanation:

answer; /// i believe that the correct answer is( it left behind rich

monarchy doesn’t have to have the hereditary element. there have been elective monarchies in the past where you choose your king-for-life and when he dies elect someone else for the job.