These similes mean that the enemy will expect victory but they will fail because God will not allow them to conquer Jerusalem. (See: [[rc://en/ta/man/jit/figs-simile]])
Here "Mount Zion" represents the people who live there. Alternate translation: "Yes, this will be what happens to the armies from the nations who fight against the people who live on Mount Zion" (See: [[rc://en/ta/man/jit/figs-metonymy]])