Izetta is powerful enough to fight whole armies, but her strength is limited.  She can only use her abilities near certain ley lines, and outside them, she's no different than a normal girl. When the Germanian army attacks in a spot far from these ley lines, the duchy is forced into a corner: how can they repel these foes without giving up the secret of Izetta's strength?
We only believe in weapons of iron!
!نحنُ لا نُؤمن إلّا بقوّة السّلاح
Wir glauben nur
an Waffen aus Stahl!
¡Solo creemos en las armas de acero!
¡Solo creemos en las armas de acero!
On ne fait confiance
qu’au métal de nos armes.
Noi crediamo solo nelle armi d'acciaio!
Só acreditamos em armas de ferro!