Just like in the Battle of Harrenhal, Connington had managed to persuade him to not participate in this battle to avoid potential mishaps. He had already proved himself by leading the attack on Storm's End. If sneaking in the darkness of the night and killing men in their sleep could even be called a battle. Still, Aegon knew that the battlefield was dangerous and if he was killed their cause would collapse. And, gods forbid, if he got captured, he would meet a very grisly end. Still, his blood was almost boiling and he longed to lead the fight and cover himself in glory. But all he managed to do was get the command of the reserve. He was watching the battle from behind on a small hill. But even without counting the reserve, the Lannisters were outnumbered and Aegon doubted that he'd take part in the fighting.