In The Hobbit, Thorin Oakenshield ... Thorin ruled Erebor, if only for a short while, before he met his untimely death during the Battle of the Five Armies, leaving his kingdom without a ruler.

there are a surprising amount of deaths in The Hobbit. Three of the dwarves -- Thorin and his two nephews, Kíli and Fíli -- all meet untimely fates. During the Battle of the Five Armies ...