They young men being killed is spoken of as if they will fall. Alternate translation: "enemies will kill the young men of Damascus in its plazas" (See: [[rc://en/ta/man/translate/figs-metaphor]])
Yahweh speaks of himself by name to express the certainty of what he is declaring. See how similar words are translated in [Jeremiah 1:8](../01/08.md). Alternate translation: "this is what Yahweh of hosts has declared" or "this is what I, Yahweh of hosts, have declared" (See: [[rc://en/ta/man/translate/figs-123person]])