When the disruption of the Israelitish kingdom came after Solomon's death, the Aramaeans rallied round the successors of Rezon.

Damascus increased in strength, and at times laid northern Israel under tribute.

Between the two kingdoms there was indeed constant intercourse, sometimes peaceful, sometimes hostile.

Syrian merchants had bazaars in Samaria, where they could buy and sell, undisturbed by tolls and exactions, and Israelitish traders had similar quarters assigned to them by treaty in Damascus.
"Damask couches" were already famous, and Ahab sent a contingent of 10,000 men and 2000 chariots to the help of Ben-Hadad II.

in his war against Assyria.