Esarhaddon selected Ashurbanipal as heir c. 673. The selection of Ashurbanipal bypassed the elder son Shamash-shum-ukin. Perhaps in order to avoid future rivalry, Esarhaddon designated Shamash-shum-ukin as the heir to Babylonia. The two brothers jointly acceded to their respective thrones after Esarhaddon's death in 669, though Shamash-shum-ukin... See more