In 701 BCE Assyrian King Sennacherib invaded Judah. He is said to have initially succeded in taking 46 towns and crushing an Egyptian relief force, sent to help the Jews, at the Battle of Eltekeh. The only two major Jewish holdouts that remained were at Lachish and Jerusalem. At Lachish the Assyrians made use of their battering rams and stormed the town after heavy fighting, Jerusalem was also put under siege. The Assyrians though, due to disease and a lack of water, were unable to maintain the siege and were instead forced to break off. The campaign supposedly cost the Assyrians 185,000 dead.
So my question is what if the Assyrians invasion went more smoothly and they were able to capture Jerusalem. What would the implications be? Would the Assyrians benefit that much? What would the result be for Jewish history?