As for the herb, the elysian plant, most of the large piles they got were from Warrior City. After helping them out so much, the Lord thought they ought to do Alterra a favor.
That said, the carriage loads of the herb were thanks to the orcs. At some point, Warrior City became one of the cities to make direct contact with orcs, though they usually meet halfway, meeting somewhere before the Orc Mountains in the far east.
There were apparently two zones for the orcs, one part was those who were in the Western side of the mountains and had most contact with humans.
The other was on the Eastern side of the long mountain range, and in terms of land area, was much larger than the western side. The mountains there were extremely tall and barren, so there was a clear distinction between the two sides. Warrior City only had connections to those from the Western side, primarily because it was too inefficient to explore the other side.
