The Gnomish Apocalypse
Legend states that the gnomish apocalypse happened centuries ago when the Gnomes created an army of clockwork soldiers, including a very large clockwork robot, and the clockwork army subsequently turned on their masters and killed them. The remaining races banded together to create hordes of armies to defeat the clockworks. Clockworks are now banned and considered highly illegal. Contstructs, golems and the like are a grey area but are generally not looked upon kindly either.