“He is war chief of the White Legs, and the worst butcher of them all. The tribes he has crushed are many. The warriors he has slain, countless.”— Waking Cloud
Salt-Upon-Wounds is the war chief of the White Legstribe and destroyer of New Canaan, living in Zion Canyon in 2281. He is the most dominant individual within the tribe, responsible for the initiation of the tribe into Caesar's Legion and the pursuit of the New Canaanites from their homeland.
Salt-Upon-Wounds is a harsh, merciless leader infamous among the inhabitants of Zion Valley for his cruelty as well as his prowess in hand-to-hand combat. He is well known for personally leading his warriors into battle, and is described as having killed hundreds enemies with his power fist. When Salt-Upon-Wounds took New Canaan, he ordered the White Legs to salt the earth so nothing could grow again. nailing the corpses to a nearby cliff. This "salt-the-earth" policy of conquest and destruction eventually made its way to Zion Valley, seeking to progressively transform Zion National Park into another polluted piece of wasteland.
Crush the White Legs: Joshua Graham will singlehandedly infiltrate Salt-Upon-Wounds' encampment and capture him and his White Legs followers. When the Courier reaches them, Graham will be systematically executing the White Legs one by one, with Salt-Upon-Wounds begging the Courier to help save him from Graham. They can either allow Graham to execute Salt-Upon-Wounds, allow Salt-Upon-Wounds to die in a "fair fight" against the Courier and Graham, or convince Graham to spare Salt-Upon-Wound's life and allow him and the White Legs to flee in peace.
If Salt-Upon-Wounds is spared and subsequently escapes, he is "a dim shadow of his former self," and is unable to prevent his people from being destroyed by their enemies soon after retreating from Zion.
If the Courier has the Sneering Imperialist perk, there are extra options referring to Salt-Upon-Wounds as "General Gobbledegook." One is to mock him, the other to tell Joshua Graham to "put a cap in General Gobbledigook."
With a Speech skill of 90, the Courier can ask Graham to spare him, after which he will run away.
The idiom "pouring salt on the wound" means to worsen an already bad situation or condition.
Salting the earth destroys plants and nutrients in the soil, essentially making the area uninhabitable for small farming communities such as New Canaan, and obliterating natural areas such as Zion. Salting the earth of a defeated opponent dates back before the Romans, although the best known example is the (mythical, not historical) salting of the earth at Carthage at the conclusion of the Punic Wars. While it's unlikely Salt-Upon-Wounds would have been aware of it, the White Legs were interested in joining the Legion, and may have picked up the idea from them.
↑The Courier: "What do you know about Salt-Upon-Wounds?" Waking Cloud: "He is war chief of the White Legs, and the worst butcher of them all. The tribes he has crushed are many. The warriors he has slain, countless." (Waking Cloud's dialogue)
↑The Courier: "What do you know of the White Legs?" Daniel: "They're hateful savages who live only to plunder and destroy. Their leader is a devil called Salt-Upon-Wounds. War is what all he knows. Everything he has, everything that tribe has, was taken by force, raiding and scavenging. It's said there's no man deadlier at close range, that that powerfist of his has smashed a hundred skulls. Maybe that's true, but so what? It's a low form of leadership. A tribe that knows only war has no future. And so he'll lead them to Caesar." (Daniel's dialogue)
↑Waking Cloud: "When Salt-Upon-Wounds took New Canaan, he ordered the White Legs to salt the earth so nothing could grow again. What kind of monster could do that?" (Waking Cloud's dialogue)