A civil war where a large portion of Ondrel's lower class tried to escape to the surface, the council sent a 7-year-old to crush them. Renee had tried to overrule the decision, but the corrupt members of the council had outvoted her 7 to 5, convincing the other clan heads by bringing up that a large exodus like this would expose them to the outside world.
And so Andrew was ordered to slaughter 900'000 men and end their rebellion.