 William F. Albright has dated his reign to 786–746 BC, while E. R. Thiele says he was coregent with Jehoash 793 to 782 BC and sole ruler 782 to 753 BC.He was victorious over the Arameans (), conquered Damascus (), and extended Israel to its former limits, from "the entering of Hamath to the sea of the plain".In 1910, G. A. Reisner found sixty-three inscribed potsherds while excavating the royal palace at Samaria, which were later dated to the reign of Jeroboam II and mention regnal years extending from the ninth to the 17th of his reign.