The Greenskins

So named because of the color of their waxy skin, the greenskins
are savagery personified. They are ill-tempered, primitive, and live
only to fight. In the absence of another foe, greenskins will eventually
turn on one another for want of violence. In their culture, might makes
right and the weakest members of society are one false step away
from being dinner.

The greenskins have no homeland to speak of. They capture other
race's settlements and then make those places their own, decorating
them with tribal graffiti, wood and scrap materials fashioned into
crude symbols, and oftentimes, the bones of those they have slain.
This leads to a very unique form of architecture that is distinctively
ramshackle.

Periodically, a powerful Orc Warboss will unite the
greenskin tribes into a single swarming mass called
a "Waaagh!", named for the common greenskin battle-cry.
In a Waaagh! , the greenskins unite into a stampede of
frenzied Orcs, Goblins and Snotlings bent on destroying
everything they encounter. Save for pure Chaos itself,
there is no force in the Warhammer world as devastating
as a Waaagh! set in motion.
At the onset of the Age of Reckoning, the greenskins have been united by the Black Orc Warlord Grumlok and his diminutive counterpart, the Goblin Shaman Gazbag. Together, they have led their tribe, the Bloody Sun Boyz, to dominance. Now, they wage war upon the Dwarfs, guided by an unseen hand.