a mass genocide lasting almost 150 years (referred to with many name, the Apocalypse, Eclipse, and Dark Ages are most well known names)
Civil Unrest/ Humanoid Extermination/ 200 year conflict (more names)
It was after the humanoids, but anyone could be killed with only a mention against them. The government was extremely weak and was pretty much useless. It is best described as a period of anarchy, with no legitimate rule.