Yahweh causing an army to defeat the Assyrians is spoken of as if Yahweh would hit the Assyrians with a rod. (See: [[rc://en/ta/man/jit/figs-metaphor]])
This is a musical instrument with a head like a drum that can be hit and with pieces of metal around the side that sound when the instrument is shaken. See how you translated this in [Isaiah 5:12](../05/12.md).
Yahweh causing the enemy army to defeat the Assyrians is spoken of as if Yahweh were a warrior who would fight along with the enemy army. (See: [[rc://en/ta/man/jit/figs-metaphor]])