When the Arameans saw that they had been defeated by Israel, they regrouped.
Here is, 1. A new attempt of the Syrians to recover their lost honour and to check the progress of David's victorious arms. The forces that were lately dispersed rallied again, and gathered themselves together, Sa2 10:15. Even the baffled cause will make head as long as there is any life in it; the enemies of the Son of David do so, Matt, Sa2 22:34; Rev 19:19.
Commenting on 2 Samuel 10:15-19
And when the Syrians saw that they were smitten before Israel,.... Considered it in their minds, and conversed with one another about it, and fearing what would be the consequence of it: they gathered themselves together; not only the forces got together again, that fled before Joab, but all the kings of Syria united their forces together, as appears from Sa2 10:19; supposing that David...
2Sa 10:15-16 The Aramaeans, however, gathered together again after the first defeat, to continue the war; and Hadarezer, the most powerful of the Aramaean kings, sent messengers to Mesopotamia, and summoned it to war. It is very evident, not only from the words “he sent and brought out Aram, which was beyond the river,” but also from the fact that Shobach, Hadarezer’s general (Shophach according...
Commenting on 2 Samuel 10:15-16