In Naruto start by saving uzumaki caln (Dropped)

why is the uzumaki clan this strong who are the 13 demon's they haven't moved since the start of war but I can feel it that they are stronger than the uzumaki that are fighting us there are using this war to train there clan members, This is not suppose go like this but no matter how strong they are they have to surender when the main army comes that's what I thought but but what is happening the hidden leaf village deceived us.