Hobgoblin artwork by LadyofHats
The Wangliang have been a part of 'Old Earth' & Hyperborea since before humans first appeared beyond the 'fourth wind'. These beings constructed some of the earliest civilizations & cities in the wake of the 'Green Death'.
AD&D first edition Hobgoblin
It is speculated that there there were millions of Hob warriors pulled from the Underworld & natural world by Hyperborean wizards during the events of Ragnarok. The spirits of dead warriors & other unnatural semi devil like humanoid armies were raised from within the Earth itself . These Wangliang were bred for generations in the fissure worlds & hidden valleys of the inner Earth awaiting the time when they would be summoned back to the surface. Efficient & highly effective these warriors commanded millions of gobelin warriors at the whims of their Hyperborean masters.
Goblin artwork by LadyofHats
These Wangliang tribes forged their tribes into nation states upon 'Old Earth' & established a foothold on Hyperborea when the black miracle of the crossing happened. But there are only two or three of Hobic nations on Hyperborea. They have moved into several abandoned Hyperborean cities & began the upward climb toward civilization. But two key events have prevented these Wangliang from gaining any serious foot hold upon Hyperborea. The first is the war of instinctual genocide waged by several tribes of chaotic humans who worship the dark gods of the Outer void. The second thing is the wraith of a Jotunn wizard who has made it his life's mission to extinguish every last Wangliang Hobic warrior from the face of the world. This is due to a blood debt but the nation state of Ha'rai near the frozen edge of Hyperborea continues to flourish. Carved out of the solid rock outcropping this community have come to inherit some of the alchemical knowledge of the Elder Ones. They have raised army of gobelin warriors but they are still vulnerable to attack by several tribes of local human warriors.
The koalinth barbarians hunt & destroy human settlements by summoning horrors from the depths as sacrificial rites to their inhuman god. The koalinth barbarians use the human remains for reproduction & foul magical rites of empowerment of the darkest magicks. Several tribes of koalinth barbarian tribes work for the aquatic serpent men elders who dwell in the sunken remains of the Atleantean cities just off the River Oceanus. They often come into human waters to raid any passing ships. They have a history with the Amazon nations of blood & warfare going back generations.
The desert dwelling Wangliang Hobic warriors of Zothique retain many of their 'Old Earth' counterparts retaining the worship of the god Maglubiyet. Roger E. Moore (July 1982). “Point of View: The Humanoids - Goals and gods of the kobolds, goblins, hobgoblins & gnolls”. In Kim Mohan ed. Dragon #63 (TSR, Inc.), pp. 25–32.