Amaziah’s success against Edom had so elated him that he thought himself more than a match for his northern neighbor. The grounds of the quarrel between them were furnished by the conduct of the hired, but dismissed, Israelite soldiers (see the marginal reference).
Let us look one another in the face - i. e. “let us meet face to face in arms, and try each other’s strength” 2 Kings 14:11-12.