Jehoahaz had protracted problems with his neighbors to the north, Syria. 2 Kings 13: 4-5 states that Jehoahaz asked YHWH for relief from the Aramean oppression and "YHWH gave Israel a deliverer." Extra-biblical data seems to identify this anonymous deliverer as Adad-Nirari who led a military campaign against Damascus in c. 803 B.C.
From a broken stone slab found at Calah. Published by Rawlinson, Vol. I, Pl. 35, No. I. Translation: Luckenbill, AR, I, §§739-740.
Property of Adad-nirari, great king, legitimate king, king of the world, king of Assyria--a king whom Ashur, the king of Igigi (i.e. the dei superi) had chosen (already) when he was a youngster, entrusting him with the position of a prince without rival, (a king) whose shepherding they made as agreeable to the people of Assyria as (is the smell of) the Plant of Life, (a king) whose throne that established firmly; the holy high priest (and) tireless caretaker of the temple é.sár. r a , who keeps up the rites of the sanctuary, who acts (only) upon the trust-inspiring oracles (given) by Ashur, his lord; who has made submit to his feet the princes within the four rims of the earth; conquering from the Siluna mountain of the Rising Sun, the countries Saban, Ellipi, Harhar, Araziash, Mesu, the (country of the) Medians, Gizilbunda in its (full) extent, the countries Munna, Persia ( Parsua), Allabria, Apdadana, Na'iri with all its regions, Andiu which lies far away in the pithu of the mountains with all its regions, as far as the Great Sea of the Rising Sun (and) from the banks of the Euphrates, the country of the Hittites, Amurru-country in its full extent, Tyre, Sidon, Israel (matHu-um-ri), Edom, Palestine (Pa-la-as-tu), as far as the shore of the Great Sea of the Setting Sun, I made them submit all to my feet, imposing upon them tribute.
I marched against the country a-imriu: I shut up Mari', king of Damascus (Imriu) in Damascus (Di-ma-á-qi), his royal residence. The terror-inspiring glamor of Ashur, my (text: his) lord, overwhelmed him and seized my feet, assuming the position of a slave (of mine). (Then) I received in his (own) palace in Damascus (Di-ma-á-qi), his royal residence, 2,300 talents of silver (corresponding to) 20 talents of gold, 5,000 talents of iron, garments of linen with multi-colored trimmings, a bed (inlaid) with ivory, a nimattu-couch mounted and inlaid with ivory, (and) countless (other objects being) his possessions.