Tsukasa’s army attacks the village. Outmatched by the attackers, they have to rely on wits, cooperation and science to fend them off.
That's more or less slavery, 
looking back on it now.
.بالتفكير في الأمر الآن، كانت تلك عبودية
Das war quasi Sklaverei.
En retrospectiva,
parece como esclavitud.
Lo recuerdo como si fuera esclavitud.
Quand j’y pense,
c’était de l’esclavage.
Come schiavi, in pratica.
É quase escravidão, se for pensar bem.
Рабство какое-то.