Ammon maintained its independence from the Neo-Assyrian Empire through tribute to the Assyrian king, at a time when nearby kingdoms were being raided or conquered. The Kurkh Monolith lists the Ammonite king Baasha ben Ruhubi's army as fighting alongside Ahab of Israel and Syrian allies against Shalmaneser III at the Battle of Qarqar in 853 BC, possibly as vassals of Hadadezer, the Aramaean king of Damascus. In 734 BC the Ammonite king Sanipu was a vassal of Tiglath-Pileser III, and Sanipu's successor Pudu-ilu held the same position under Sennacherib and Esarhaddon. An Assyrian tribute-list exists from this period, showing that Ammon paid one-fifth as much tribute as Judah did.