 In c. 732 BC, Pekah allied with Rezin, king of Aram and threatened Jerusalem.The prime reason for such a league was probably to protect their respective countries from another incursion of Tiglath-pileser III., who had compelled Menahem, in 738 B.C., to pay a large tribute.The two kings united their armies and attempted to coerce Ahaz of Judah into joining them.