What does 1 Kings 20:24 mean?

They told him, 'Replace the kings with military commanders, and raise an army like the one you lost—horse for horse, chariot for chariot. Then we’ll fight them on the plains, and we’ll win.' Ben-Hadad agreed and did what they suggested. 1 Kings 20:24 - Modern Text Bible

(They suggest a new strategy: swap out the kings for real commanders, rebuild the army, and fight on the plains.)