 The Chaldeans and Babylonians again allied with their more powerful Elamite neighbors in this endeavour.This prompted the enraged Assyrian king Sennacherib to invade and subjugate Elam and Chaldea and to sack Babylon, laying waste to and largely destroying the city.Babylon was regarded as a sacred city by all Mesopotamians, including the Assyrians, and this act eventually resulted in Sennacherib's being murdered by his own sons while he was praying to the god Nisroch in Nineveh.