The Incursions of Chaos into the Worlds Edge Mountains have overrun many Dwarfholds and, over the centuries, others have had to be abandoned. Against this, the Dwarfs have struggled to maintain their existence for centuries and have developed armies of highly-trained warriors who specialise in combat underground. Nearly all Tunnel Fighters are Dwarfs, as might be expected, as Humans only become involved as mercenaries, seeking to be rewarded with Dwarven treasure. In recent years, as the Dwarfs have declined still further, even Halflings have been known to take up the life of the Tunnel Fighter, for the rewards are often great.