The Israelites put everyone in Hazor to the sword, devoting them to destruction. Nothing that breathed remained, and Joshua burned down Hazor itself.
We have here the same improvement made of this victory as was made of that in the foregoing chapter. 1. The destruction of Hazor is particularly recorded, because in it, and by the king thereof, this daring design against Israel was laid, Jos 11:10, Jos 11:11.
Commenting on Joshua 11:10-14
And they smote all the souls that were therein with the edge of the sword, utterly destroying them,.... Men, women, and children: there was not any left to breathe; any human creature; for as for the cattle they were taken for a prey: and he burnt Hazor with fire; as he did Jericho and Ai, though no other cities he had taken; but it seems...
he burnt Hazor with fire--calmly and deliberately, doubtless, according to divine direction.