Jamieson, Fausset and Brown on 2 Chronicles 14:7

7. while the land is yet before us--that is, while we have free and undisputed progress everywhere; no foe is near; but, as this happy time of peace may not last always and the kingdom is but small and weak, let us prepare suitable defenses in case of need. He had also an army of five hundred eighty thousand men. Judah furnished the heavily armed soldiers, and Benjamin the archers. This large number does not mean a body of professional soldiers, but all capable of bearing arms and liable to be called into service.

2Ch 14:9-15. He Overcomes Zerah, and Spoils the Ethiopians.