Onyxia's forces besiege the gate of the dwarven holds

The forces of Onyxia had long since invaded the lands of the dwarves, but the dwarves paid little attention. The great geates, the first great project of the dwarven clans, could not be broken, or so they though. For five years waves of Onyxia's forces smashed themselves against the gates. The foundation buckled and the walls cracked until the flood was finally set free, the dwarven villages along the great path, drowning in a sea of death.