 When Pekah allied with Rezin, king of Aram to attack Ahaz, the king of Judah, Ahaz appealed to Tiglath-Pileser III, the king of Assyria, for help.This the Assyrian king obliged, but Judah became a tributary of Assyria.With the aid of a band of Gileadites, from whose home territory he probably originally came, he slew Pekahiah and assumed the throne.