From the mount Halak - All the mountainous country that extends from the south of the land of Canaan towards Seir unto Baal-gad, which lies at the foot of Mount Libanus or Hermon, called by some the mountains of Separation, which serve as a limit between the land of Canaan and that of Seir; see Joshua 12:7.
The valley of Lebanon - The whole extent of the plain which is on the south, and probably north, of Mount Libanus. Calmet conjectures that Coelesyria is here meant.
The mount Halak - See the margin and reference. The name serves to mark the southern limit of Joshua‘s conquests. It suits equally well several of the ranges near the south border of Palestine, and it is uncertain which of them is the one here indicated.
Baal-gad Joshua 12:7; Joshua 13:5 is probably Paneas, the Caesarea Philippi of later times. The name means “troop or city of Baal,” or a place where Baal was worshipped as the giver of “good luck.” Compare Isaiah 65:11. It was probably the same as Baal-Hermon (Judges 3:3; 1 Chronicles 5:23; and see Deuteronomy 3:9).