This is Northern War. It's an anime that takes place between CS2 and CS3, that follows the events of the annexation of North Ambria. I'd definitely recommend watching it.
The Ganja had been sick and starving for a long time. The food reserves had run out, and the water is poisonous. The Ganja corps had to choose between dying of sickness or starvation. Fear spread and worse situations were expected. At this time, Wazukyan took Irumyuui’s children out and killed them in front of his fellow sages Vueko and Belaf in order to feed them and everyone else. He said, "You have all been working hard at caring for the sick. Your loyalty is uncompromised despite the long-lasting hunger. Since I cannot cut out my own flesh to feed you, how can I keep this child and just ignore the dangerous situation?" Belaf cried, for he did not wish to eat [the children]. Wazukyan ordered them to eat the flesh. Afterwards, they took the dead children of Irumyuui. When there were no more dead kids left, they turned to the still living. 20,000 to 30,000 children were eaten. Children always remained delicious.
