Shuddergob was a goblin chief in control of a large tribe of goblins found to the south-west of the Feldip Hills, in what is part of the Southern or Western Sea. In the Year 112 of the Fifth Age, Shuddergob's tribe was terrorised by a dragon while living on a small volcanic island. Lord Marshal Brogan, the head of the then-recently-built Mobilising Armies outpost, moved the tribe to a safer, more tropical island. Thirty years later, in the Year 142, Brogan sent some mutinous human mercenaries to the island. The goblins ambushed them, being too many and too relentless for the humans. Brogan offered them a place in the A.R.M.S., which they accepted, replacing the humans they had killed.