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.
It goes without saying that, strategically,
this is close to a surprise attack.
،لا شكّ أنّ من الناحية الاستراتيجية
Strategisch gesehen kommt dies offenkundig
einem Überraschungsangriff nahe.
No hace falta decir que esto sería
No hace falta decir que esto sería
Va da sé che, strategicamente,
questo è una specie di attacco a sorpresa.
Não é preciso alertá-la
Как ты уже поняла, это внезапная высадка.