Assyria and Elam clash again in 658/657 BCE, the reason being an action against the Assyrians in 664 by the treasonous province of Gambulu, for which Ashurbanipal had finally decided to punish them.

On the other hand, Teumman sees his authority threatened by the Elamite princes at the Assyrian court and has demanded their extradition.

When the Assyrian forces invade Elam, a battle follows at the Ulaya river.

Elam is defeated in the battle in which, according to Assyrian reliefs, Teumman committed suicide.

Ashurbanipal installs Humban-nikash as king of Madaktu and another prince, Tammaritu, as king of the city Hidalu.

Elam is considered a new vassal of Assyria and tribute was imposed on it.

With the Elamite problem solved, the Assyrians can finally punish Gambulu and seizes its capital.

The victorious army then marches home, taking with them the head of Teumman.