This monarch once put a dog chain around a defeate
This monarch once put a dog chain around a defeated rival king and confined him to a  kennel at the east gate of his capital. He conquered Egypt's Twenty-Fifth Dynasty and  installed a vassal, Psamtik the First, as pharaoh. Later he attacked and destroyed Susa, the capital of Elam. Reliefs on his palace walls celebrate his military exploits, but he secured his place in history by establishing the first royal library, with over thirty thousand clay tablets including the Enuma Elish creation story and the Epic of Gilgamesh. For 10 points, name this king of Assyria with his capital at Nineveh.
This monarch once put a dog chain around a defeated rival king and confined him to a  kennel at the east gate of his capital.