User blog comment:Tyrannoraptor/Has Smaug ever intruded before?/@comment-71.174.40.215-20141229081210

Smaug originated in the North where many worms such as himself had come from. Other worms such as the ones who drove the Dwarves to the Iron Hills are from the North. This is all we know, his first mention is him appearing/destroying Dale and seizing Erebor. After ruling Erebor for roughly 200 years he then attacked Laketown and was ultimately slain by Bard. The North is a phrase used to say that they came from an uncharted region North of what is known. As for "types of locations" he's attacked the Men's City of Dale, Laketown, and the Dwarves' Kingdom of Erebor.