Elam and Kir were part of the Assyrian army that threatened the people of God. The Assyrians forced their subjugated and allied nations to participate in their wars. The Elamites were known for being expert archers. “Uncovered the shield” means that these people were ready for battle.
6 Elam porte le carquois; Des chars de combattants, des cavaliers, s'avancent; Kir met à nu le bouclier.