In the face of Yang Ling's powerful Magical Beast army, the Rossi soldiers who had wanted to exterminate the Banto forces had no choice but to stop in their tracks and let Steve go.
In order to successfully execute the next step of the plan, Yang Ling ordered Goode to escort Steve and his group back to Wissen Castle. He gave the excuse of protecting Steve from the sneak attacks of the Rossi forces, but in actuality, Yang Ling wanted to place Steve under house arrest.
A count after the battle revealed that only about a hundred of the Rossi soldiers remained, and almost all of them were injured, including the prince Renaya. The Rossi had suffered heavy casualties, but the Banto were nearly exterminated, with merely a few dozen people left.
All that was left of the three thousand Black Armor Guards were a few dozen people!