Yahweh said to Joshua, This day will I begin to magnify you in the sight of all Israel, that they may know that, as I was with Moses, so I will be with you.
The seven condemned nations of Canaan  (Joshua 3:10).  The seven peoples enumerated here were the principal racial divisions of the fragmented city-states of the land of Canaan.  Several times in the O.T. these lists appear, not always exactly as they are here.  Similar lists are given in  Genesis 15:19-21;  Exodus 3:17;  Exodus 23:28;  Deuteronomy 7:1.  The extreme debauchery of the pre-Israelite Canaanites provided the moral ground upon which God found it necessary to destroy them.  The shameful sins of mankind until this very day may be traced, in part, to the failure of Israel to obey the Word of God in the "cutting out" of the moral cancer of Canaan.  God had long ago marked out the Canaanites for destruction, but the reason that it did not occur sooner was that "their cup of wickedness" had not become full.