played a huge role in the air. give us a sense of the u.s. role in the operation. >> reporter: predominately in the skies without a doubt. one canadian volunteer i spoke to fighting alongside the peshmerga as a medic, jason said if it wasn't for them, the air strikes, this would not have happen. he has seen soldiers die in front of them. he was fighting religious fascism. there are military advisers on the ground here. that is admitted by the pentagon. they are helping calling the air strikes and assisting with tactics. a swift victory here. some may say that is a victory for the obama administration in an advisory role in the fight against isis or it may be the