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?
and to make it easier to move troops and
supplies to the Mediterranean and Africa.
وتسهيل نقل القوّات
y facilitar la movilización de tropas y
provisiones a África y el Mediterráneo.
y facilitar el movimiento de tropas 
y víveres entre África y el Mediterráneo.
pour faciliter l’envoi
d’hommes et de biens
così da facilitare lo spostamento
di materiali e persone
e assim facilitar