What are the advantages of iron tools and weapons over stone and copper ones?

What are the advantages of iron tools and weapons over stone and copper ones? what militaryinvolution did the Assyrians use? what did the painters and sculptors depict in the Assyrian palaces? What books were collected in the library of King Ashurbanipal? why did they survive the fire?

1) Iron tools were stronger and more durable than copper and stone.

2) The Assyrians used battering weapons (ballistae, catapults, battering rams, etc.).

3) Most often they depicted lions – the symbol of the capital of Assyria, Nineveh (the city of lions).

4) The legendary library of Ashurbanipal contained many scientific works, collections of folklore and magical treatises.

5) A significant part of the books survived, as they were written on clay tablets.