 The very first "written historical attestation" of the existence of Chaldeans occurs in 852 BCE, in the annals of the Assyrian king Shalmaneser III, who mentions invading the southeastern extremes of Babylonia and subjugating one Mushallim-Marduk, the chief of the Amukani tribe and overall leader of the Kaldu tribes, together with capturing the town of Baqani, extracting tribute from Adini, chief of the Bet-Dakkuri, another Chaldean tribe.Shalmaneser III had invaded Babylonia at the request of its own king, Marduk-zakir-shumi I, the Babylonian king being threatened by his own rebellious relations, together with powerful Aramean tribes pleaded with the more powerful Assyrian king for help.The subjugation of the Chaldean tribes by the Assyrian king appears to have been an aside, as they were not at that time a powerful force or a threat to the native Babylonian king.