King of Babylonia (747-734) Also known as Nabonassar, this king dealt with an upsurge of Assyrian expansionism. It is unclear whether the four campaigns waged by the Assyrians in Babylon were interventions against Chaldean and Arameans at the request of Nabû-nāṣir or whether that was merely a justification forwarded by Assyrian royal inscriptions. Apparently, the city of Borsippa rebelled against this king (ABC 1). No royal inscriptions are known, but 22 economic texts dating to his reign have survived.