It was on what is now the Benysial Plateau, one of the last battles of The Calamity took place. Here The Strife Emperor and his armies of goblinoid legions fought against the Wildmother and lost. The curse of the Strife Emperor was lifted and the goblinoids were left to their own devices in the barren landscape. When the Strife Emperor was defeated and banished to his planar prison, his iron armor remained and fell to the ground. The helm is used as the palace of the Iron Emperor, while the rest of the armor is used to supply the war machine of the Iron Authority.
After the calamity, the hobgoblins took control over the different tribes and launched military campaigns against the other tribes on the plateau. For most of the history, no hobgoblin tribe dominated for long until they fell to internal distrust and greed.
However, around 720 PD, the Iron Authority emerged and conquered the plateau, but their empire did not fall. With the whole of the Beynsial Plateau under the control of the Iron Emperor, Tz'Jarr, the Iron Authority began their long war to subjugate the jungle below.