Answer:
The Assyrians rule their empire by maintaining a Professional National Standing Army and conquest.
Step-by-step explanation:
The Assyrian Empire was ruled through a Monarchy, which meant that it had a King that was an administrative entity that controlled multiple places and populations. The Empire in which everyone that was considered a citizen was a soldier also held the King as the commander in chief of the military. Furthermore, The Assyrians were the first ones to have a Professional National Standing Army, meaning people were trained and compensated with money for being a soldier, and as its name says they were permanent implying that they maintain their positions even at times of peace. Besides, Assyrians were known for their conquests, following the method of removing the population of a certain area to another one where they were needed with the goal of breaking ties between the people and their lands allowing them to exercise control over a new area. The Assyrians established a new city with each new King where they built lavish castles and created royal roads inside their Empire that allowed trading. As well, in order to control certain areas the King divided the Empire into provinces which were ruled by eunuchs in order to ensure they will not have successors. Overall the Assyrians were innovative in their conquest, psychological, and military tactics that relied on fear to rule a population.