Jamieson, Fausset and Brown on Joshua 11:16

16. So Joshua took all that land--Here follows a general view of the conquest. The division of the country there into five parts; namely, the hills, the land of Goshen, that is, a pastoral land near Gibeon (Jos 10:41); the valley, the plains and the mountains of Israel, i. e., Carmel, rests upon a diversity of geographical positions, which is characteristic of the region.