 The refugees from the Grey Mountains who did not return to the Lonely Mountain colonized the Iron Hills, one of the only Dwarf realms never to be abandoned or taken.The main body of the Dwarves became a wandering people, and Thrór, who had been king of the Lonely Mountain when it was captured, was slain by Orcs in the year 2790 and his body mutilated.This led to the War of the Dwarves and Orcs, in which nearly all of the Orc hordes of the Misty Mountains were exterminated but half of the Dwarf host was killed, a blow that took the Dwarves several hundred years to recover from.