How was the empire ruled through the violence and brutality of Assyria?

In the 1st millennium BC. in the Ancient East, Assyria began to rapidly gain power, which in the 9-7 century BC. became the most powerful state in this territory. So, in the course of long conquests, Assyria included: Egypt, Syria, Palestine, Phenicia. It is known that Assyria was ruled by cruel kings who relied mainly on military force, and therefore, any uprisings were very brutally suppressed.