Actually, no one expected this result. Even though many believed that these war machines could breach the city walls, no one thought it would be this fast.
Not to mention the Ogres defending the city were caught off guard, even the main forces were unprepared.
The main forces hadn't received the order to attack; they stood there dumbfounded, watching the once tall and heavy city walls collapse, forming sloped breaches.
The Ogres suffered not insignificant casualties, yet they couldn't even react before the Ogres in the rubble began setting up defenses.
The direction of the player army's garrison was also the direction of the main force's attack. By this point, the Ogres could no longer ignore the players' power, as the recruits in their eyes had not yet grown up.
But now, the one who broke their indestructible walls was a new recruit, and sub-dimensional Ogres are not without opponents in the sub-dimension.