When the Yelan Army made their retreat, they had positioned themselves on top of a cliff overlooking a Woodland, which had countless trees that the Ammarian Army had used as cover during their night battles.
Since their original camp was stationed in the Marshes, they had only made a temporary camp at the rear of the woodlands.
A tenth of the Ammarian Army was busy taking down their former camp as per General Phobus orders and was currently on the way to their new one in order to bring along their resources and food supply.
Because of this, scouts were sent out to look for food for the army as well as to keep surveillance on their enemies.
Since the Yelan Army was short on manpower, they didn't dare to send their scouts to the woodlands and only assigned some soldiers to keep watch to make sure that they would be able to sound a timely warning if their enemy chose to attack.