When was the period of the major achievements of Assyria?

The Assyrian Empire (c. 3000 BCE–c. 612 BCE) was one of the most formidable kingdoms of the ancient world. Their army was a force to be reckoned with, and their achievements in art and architecture were astounding. In particular, the Late- or Neo-Assyrian period (911 BCE–612 BCE) is considered the era of their greatest achievements. It must be noted that though this is considered a period of achievement, it is also marked by astonishing levels of inhumanity and decimation of other peoples. The Assyrians had a deportation policy where they simply removed people from territories that the Assyrians coveted. This could not be accomplished without great military might and organization. In particular, their Iron Age armor is considered some of the best armor in the ancient world. Due to their military superiority, it took a combined force of the Persians, Babylonians, Scythians, and Medes to defeat the Assyrians at the Battle of Nineveh, which led to the fall of the great empire.
https://www.ancient.eu/Ashurbanipal/

https://www.ancient.eu/assyria/

https://www.ancient.eu/Neo-Assyrian_Empire/