It happened, when Jabin king of Hazor heard of it, that he sent to Jobab king of Madon, and to the king of Shimron, and to the king of Achshaph,
The various peoples solicited by Jabin to join the coalition are enumerated in  Joshua 11:3,4, and, from the mention of the several racial groups that made up ancient Palestine, it seems that Jabin attempted to rally all of the Canaanites of the whole area for a war against Israel. Dummelow, however, thought that the racial groups cited here was more of a geographical than a racial identification."[9]  This attempt succeeded in amassing an army of some 330,000 men, with the heaviest armour then known, namely horses and chariots.