Half-Orcs (Foundation Lands Supplement)
From D&D Wiki
In the ancient lands of humans only tempered orcs (half-orcs) remain. After two thousand years being considered second class, the Warlord Gudthar, a tempered-orc himself, united the tribes creating a new era for his people, as chiefs of the most fertile lands in the known world. Three thousand more years and the only pure orcs left are uncivilized ostracized outcasts while the half-orcs still rule the vast river valleys of the west.
They are now a race in their own right, and are normally simply called orcs.
Their lands share some resemblance with human lands with many buildings made out of wood and clay. Forts, walls and towers protect their cities and villages and very strong familiar structure create the resemblance of union.