Eron and Dyne would stay behind, while Zephyr, Otis and Kian would join Jace's group to go to the battle. They needed a lot of people to join them, or else, once they fell, everything would fall along with them, there was no one to be saved and everyone would fall into the pity of Decratic, where most of them still had not yet learned the truth and only saw him as King Alan.
Joel, Finn and Trion would be in Cane's group along with Dean and Pax and some more warriors and knights.
Thousands of people gathered, shifters, knights and magic users alike. These faces were the faces they might not see after everything was done, whether they won or lose, there was no war without sacrifices and no one could tell, who was going to meet their demise.
They were well aware of that fact, after all, you wouldn't be a warrior or knights in the first place, if you were not ready to give your life to accomplish your task.