 In 851, following a rebellion in Babylon, Shalmaneser led a campaign against Marduk-bēl-ušate younger brother of the king, Marduk-zakir-shumi I, who was an ally of Shalmaneser's.In the second year of the campaign, Marduk-bēl-ušate was forced to retreat and was killed.A record of these events was made on the Black Obelisk