'Fall by the Sword' in the Bible

Why did Yahweh bring us into this land to fall by the sword? Our wives and our little children will become plunder; would it not be better for us to return [to] Egypt?"

because the Amalekites and the Canaanites [are] there {before you}, and you will fall by the sword; because you have turned [back] from Yahweh, and Yahweh will not be with you."