Under Shattiwaza , Hanigalbat ( a remnant of the Mitanni empire ) had become a vassal state of the Hittite empire , celebrated with a treaty , as a buffer to the ascendant Assyrians .
This allowed the Assyrians to turn their attention to the conquest of the Mitanni .
Under Shattiwaza , Mitanni ( a remnant of the Mitanni empire ) had become a vassal state of the Hittite empire , celebrated with a treaty , as a buffer to the ascendant Assyrians .
This allowed the Assyrians to turn their attention to the conquest of the Mitanni .