[6] In 805 BC, Halparuntiya III invaded the neighbouring kingdom of Kummuh for territorial reasons.

[7] Around 800 BC, Gurgum was part of a coalition of numerous Neo-Hittite and Aramean states hostile to the Hamathite king Zakkur.

In the reign of Tarhulara in 743 BC, Gurgum also took part in an anti-Assyrian military alliance led by Sarduri II of Urartu and Mati-Ilu of Arpad.

The Assyrian king Tiglath-pileser III defeated the hostile alliance and also invaded Gurgum, destroying 100 Gurgumaean cities.

The Assyrian king Sargon II responded by deposing Muwatalli III and deporting him to Assyria.