THE DIFFERENCE BETWEEN THE TWO

Quentin soldier's morale soared on one side of the battlefield pushing the enemy lines.

On the other flank side Kyle was struggling with Pericles but on the other side, like a knife cutting through butter, Aero and his band of cavalry is cutting through the line. 

The blade formation is a formation that only Aero could do. 

Because of the requirement of this modified blade formation, other than Aero not many people would have the bravery to use it the way he is using it

He would act as the tip of the sword, cutting everything that is front of him with his strength while the cavalry behind him would uses their long spear to kill anyone that he had missed while keep moving forward.

There is of course a risk of using this kind of tactic and strategy. This would always give the enemy the opportunity to envelop their army

The only way to avoid that is to keep moving without stopping. And when moving, they must clear each obstacle around them.