Booker "The Lone Wolf" is a one-man military campaign. His "work" mainly involves the killing of Sang Soldiers. Many of them. Works alone due to some past personal loss? No one can match his inherent badass-ness. 

Booker is a nod to the influential 1978 actioner Good Guys Wear Black in which Norris portrayed a character named John T. Booker. He mysteriously comes out of nowhere to save the Expendables butts. They call him Lone Wolf. He's there when you need him, and gone when you don't.

Chuck Norris
First Seen The Expendables 2
Last Seen The Expendables 2
Name Booker
Status Alive
Job Retired Military Operative