In 612 BC, the Bablyonians mustered their army again and joined with Median king Cyaxares encamping against Nineveh. They laid siege to the city for three months and, in August, finally broke through the defenses and began plundering and burning the city. The major factor in the city’s downfall was the Medes. The Assyrian King Sin-shar-ishkun was killed in the siege. His brother Ashur-uballit II was made King of Assyria. He refused to submit, however, and successfully fought his way out of Nineveh, founding a final capital at Harran.