Speculation

"Is that possible?" Historia looked at them with a worried expression.

Paul thought for a moment and said, "It's possible. In fact, that's the reason we are here. We can even assist you in bringing the medicine around. With our squad, it's impossible for the demons to crush us that easily. In exchange, you have to tell us everything and do one thing for us."

"I understand." Historia nodded. She opened the map of the region and pointed at five cities, including the one they were in. "These are the five cities that are under attack. From our observation, there are approximately four thousand demons attacking this base alone.

"As for the others, their situation might not be as bad as this place, but they still have to fight at least one thousand demons. It's hard for a small group to handle that kind of number."