General Scoll's voice reached the mage squads stationed in the backlines, and magic barriers protecting the combatants in front of them flew up only moments later.
The battle was a complete mess, and there was no way to separate the two forces. So, the mages cast their barriers so that they aligned in front of the middle of the fighting, on the side of the Alliance of Kingdoms. The barriers were simple and hung in the air above the combatants and shielded the people below from incoming projectiles and magic, the type of attacks that were the most dangerous and the hardest to defend against as a melee combatant.
The barriers made a clear separation between the two forces. The humans and their allies stepped back and under the barriers' shadows. And the demons rushed to escape the numerical disadvantage they found themselves in as their enemies reorganized themselves beneath the barriers.
Large-scale battles are quite messy and kinda hard to write, but I hope I did (am doing) a decent job :D