Sennacherib was assassinated in 687 BCE.
Arda-Mulissu (Arda-Mulii)  Sennacherib's eldest living son by the time of Ashur-nadin-shumi's death in 694 BC, he served as his crown prince from 694 BC until 684 BC, when for unknown reasons he was replaced as heir by Esarhaddon
In angry response to this disrespect, revolts a month apart in 704 or 703 BC overthrew Sennacherib's rule in the south

