1. The fire was a ploy to get Army B's attention. While Army B was busy putting out the fire, Army A had an opportunity to intrude into Army B.2. Army A created a diversion by starting a fire at Army B's camp so that Army A could attack the Army B's headquarter while Army B were putting out the fire.3. Every magic trick is about manipulation and misdirection.
 diversion misdirection ployploy 就是障眼法的一個計劃，也可以很簡單的用 plan 就好了，但不會那麼傳神