John Chrysostom
Consider the verses that state, "Thou hast punished the nations, and the wicked perish." Observe that God does not require physical weapons—no sword, bow, or arrows—since such expressions are merely figurative. It suffices for God to simply declare a prohibition, and those deserving of retribution will be vanquished. To further acknowledge His might, listen to this: "Thou hast blotted out his name for ever and ever." This means that He has completely annihilated them, pulling them up from their very roots, leaving no trace of their memory.