Deploy the army into a triangle and form a spear head for a total center penetration assault. The small hook on the edge of the spear is to counterattack enemy's flanking forces.

Use this formation for a desperate attack. You army is weaker in all fronts so concentrate your attack and rush in order to break the enemy line in the center. If you can break through, rush to the enemy HQ, kill enemy marshal, cut down the enemy's flag and hope that the enemy retreats.