Tiglath-Pileser III
When Tiglath-Pileser III ascended the throne, Assyria was in the throes of a revolution. Civil war and pestilence were devastating the country, and many of Assyria's most northerly colonies in Asia Minor had been wrested from it by Urartu. In 746 BC, the city of Kalhu joined the rebels, but on the 13th of "Iyyar" in the following year, an Assyrian general (Turtanu) named Pulu seized the crown under the name of Tiglath-Pileser III, and made sweeping changes to the Assyrian government, considerably improving its efficiency and security.