What achievements and lessons did the Assyrian empire leave us with?

What achievements and lessons did the Assyrian empire leave us with? the transition to the Iron Age is good or bad for humanity.

At one time, Assyria made significant achievements in military affairs, the Assyrian kings were able to create a powerful army, a feature of which were engineering troops. True, the rule of Assyria in the ancient east was very cruel, all the conquered peoples suffered greatly. In this connection, a rebellion was soon raised, where the combined forces of Babylon and Media were able to end the tyranny of the Assyrian Empire.

In the 12th century BC, people learned to work with iron. On the one hand, this made it possible to make a technological leap, and to start producing new tools and other devices of better quality. On the other hand, with the advent of iron in the ancient east, weapons began to be massively produced, which led to a wave of wars that destroyed a significant part of the ancient states.