I was trying to save an Alternian civilization from extinction (Fortbent; gotta play my own mods sometimes).
To this end, I made a fortress and retired it once ~75 citizens were reached. Some fun stories were had, like how 4 of the starting seven got into relationships with each other before migrants arrived, and how over 70% of the relationships in the fortress were between one male and one female despite the incredible statistical unlikeliness of that (the species has a 95% chance to be interested in either sex; this translates to 90.25% chance of being bisexual, which means that the chance of male/female relationships are only 1/3), or how a titan came and caused the entire army to go blind with blistering dust, but all were healed by one of them, who happened to be a Sylph of Life (who can heal people fully once they go god tier).
Afterwards, I took an adventurer out of said fortress and had her go to the human capital. The humans were the ones who had been driving the Alternians to extinction, of course. Once she entered, she saw their leader, a fully god-tiered Knight of Light vampire... Beforan. The same species, but significantly more peaceful. So this Beforan had been killing his own species, consistently and repeatedly... because of a dispute over the treatment of plants. An intra-racial holy wars over cultural disputes. Naturally, she thought this was heinous, so she accused him of being a vampire, grabbed onto his neck, and began slashing at him until she decapitated him.
But the others were accessories to this vampire's crimes. Oh yes, they had to pay too. She killed them all, every noble in the city. She then took over the place for herself.
I'm deeply hoping she'll be an evil overlord and continue the war against her own people, heh. It's just the funnest thing that could happen.