'By the Sword' in the Bible

Why is the Lord bringing us into this land, to fall by the sword? Our wives and our little ones will become plunder; would it not be better for us to return to Egypt?”

For the Amalekites and the Canaanites will be there in front of you, and you will fall by the sword, inasmuch as you have turned back from following the Lord. And the Lord will not be with you.”