Perrin 's army attacks first , destroying the Trollocs and saving the Children .
Meanwhile , Galad 's Children are unaware that they are about to be ambushed by the Trolloc army intended for Perrin .
Perrin 's army attacks first , destroying the Trolloc and saving the Children .
Meanwhile , Galad 's Children are unaware that they are about to be ambushed by the Trolloc army intended for Perrin .