More specifically, it is an illustration of tactics using fire in which one ties the legs of a bird on the back of a fox and set fire to the wings and send them to the castle of enemy.
具体的には、火攻めの兵法として、狐の背に烏の脚を縄で括り付け、その翼に火を点けて敵城に放つ戦術の図解である。