Preparation for war . . .
"You mentioned about levels? How does it work?" I asked.
And Athena answered, "I know it's confusing at first. But when you'll create your first army, everything will be easier from there. And about your query, every race you produced would start out as level one. And unless you build a Research Facility and have the necessary manpower to operate it, you can upgrade their levels from there and unlock their skills along with it.
"Of course, there's always an option of using a real inhabitant as your troops, but the more deaths you incurred in your fief, the more your realm would suffer."
"So, in short, it's best to use this creatures born from research and elixirs to fight?"
Athena nodded. "That's right. For this world would suffer ruin if every war were manned by the inhabitants."