Nabonassar

Nabû-nāṣir was the king of Babylon from 747 to 734 BC. He deposed a foreign Chaldean usurper named Nabu-shuma-ishkun, bringing native rule back to Babylon after twenty-three years of Chaldean rule. His reign saw the beginning of a new era characterized by the systematic maintenance of chronologically precise historical records. Both the Babylonian Chronicle and the Ptolemaic Canon begin with his accession to the throne. He was contemporary with the Assyrian kings Aššur-nirarī V (755–745 BC) and Tiglath-Pileser III (745–727 BC), under the latter of whom he became a vassal, and the Elamite kings Humban-Tahrah I (reigned until 743 BC) and Humban-Nikaš I (742–717 BC).^: 9–10