Bandits are closing in on Pastry's fief, and his father can only round up peasant conscripts to try and fight them off. Pastry and his friends decide to try and do what's in their power to help everyone, even though they're just kids.
The flank of that line 
will be their weak point.
.سيكون جانب ذلك الصّفّ هو نقطة ضعفهم
Die Flanke dieser Linie wird
ihr Schwachpunkt sein.
El flanco de esa línea
será su punto más débil.
Ese flanco será su punto débil.
puis leur flanc sera exposé.
Questa formazione sarà il loro punto debole.
Essa mesma linha será seu ponto fraco.
Это будет их самой большой ошибкой.