The Empire is launching a seemingly foolish attack on the Entente Alliance in the middle of winter.  They lack the supplies to successfully invade.  Tanya realizes that this attack is a feint intended to distract from a fjord landing mission.  Sure enough, she is sent to lead the invasion of the fjords, and silence 20 cannon emplacements in time for the fleet to land and the Imperial forces to disembark.
Again, this plan relies on surprise.
سبق وأن سمعتم بهذا، إلّا أنّ هذه
الخطة تعتمد على عنصر المفاجأة
Ich wiederhole mich mal.
Ya lo escucharon, pero 
el plan depende de la sorpresa.
Ya lo habéis escuchado,
pero el plan depende de la sorpresa.
Je vous rappelle que le plus important
est l’effet de surprise.
So che vi è già stato detto,
Já foram informados, mas este é um 
plano que depende do fator surpresa.
Ещё раз напоминаю,
внезапность — залог успеха.