The reaping plague was a highly-lethal, highly-mutagenic contagious disease that swept across central and southern Feraweth around 500 years ago. It affected intelligent humanoids only, most frequently humans and elves, and left few survivors.
The Dragonstide Campaign occurred 200-300 years ago; led by a human queen, it was a comprehensive multiracial war to eradicate all dragons on the continents of Elomawan and Feraweth.