Kingdom of Myrtana
The Kingdom of Myrtana is the human realm to which Khorinis belongs. It is ruled by King Rhobar II, and at the start of Gothic 1 Remake it is losing a desperate, multi-front war against the Orcs.
The Orc War
The Orcs are pressing Myrtana hard enough that normal steel is no longer enough. Only weapons forged from magical ore can reliably push the Orc horde back, which is why the Crown is willing to do anything to keep the ore supply flowing, including turning all of northern Khorinis into a sealed convict labour colony.
Relationship to the Colony
Every political decision inside the Valley of Mines loops back to Myrtana at some level. Gomez's Old Camp exists because the Crown accepts ore in trade. The Fire Mages were loyal to the Crown when they raised the Barrier. And the whole reason the Nameless Hero was thrown into the Colony in the first place is that Myrtana's penal system has been broadened to feed the mines.