The tight Imperial Phalanx is not "Rushing into our spears", as our noble infantry have larger shielder built for defense. Thus forcing u into a stalemate, and union moving troops from ur main front to try and encircle us is another foolish move, as our troops in the rear notice your swordsmen trying to do so and intercept them with their longer spears. With this, we are able to conducta breakthrough move through ur lines and forcing u into a retreat elsewhere.
1. Trebuchets were NOT invented in the early iron age, that's like inventing Greek fire, like, right now. 2. Even if u did, how are u firing them from so far away?