William Dunn

"For the wolf to survive, he's gotta chew off his own leg"

- Dunn in Fishing in Baku

Staff Sergeant Dunn was a U.S. soldier in Battlefield 4. After being wounded in action and having his right leg amputated, he was killed after his team was involved in a car crash that left their vehicle underwater. He ordered Recker to shoot the windshield out and save the other two members of the team, sacrificing himself in the process.

Biography
Wounded in action during a mission with Recker, Irish and Pac, Dunn was trapped under a piece of debris. He ordered Recker to amputate part of his right leg and after it was done, he passed out.

Death
While attempting to evade a Russian Mi-28 helicopter gunship, Recker crashed into a body of water. Dunn ordered his men to escape and let him drown, sacrificing himself for them. The mission was deemed "pointless", as what they discovered, they already knew, causing Dunn to die in vain.