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(Greek, Sammugen or Saosduchinos). King of Babylon (667–648 B.C.). Son of Esarhaddon.
Circa 653 B.C., Shamash-shum-ukin raised a rebellion against his brother Ashurbanipal, king of Assyria, who had supreme authority over Babylon. The rebellion was supported by most of the peoples subjugated by the Assyrians—the Arab tribes and the citizens of the Chaldean and Syrian principalities, Elam, Media, Judea, Lydia, and Egypt. Shamash-shum-ukin committed suicide after the defeat of his army and the capture of Babylon in 648 by Ashurbanipal’s forces.