During the initial discovery of Requiem, she worked alongside the Master Chief to repel Promethean forces.
While "Sarah-113-017" is not a standard canon designation (as Master Chief is John-117 and typical Spartan-IIs use three-digit tags like Sarah-048), Palmer is the most prominent "Sarah" in the Spartan branch. sarah-113-017_jpg.jpg
Before becoming a super-soldier, Palmer was a highly decorated . Her transition to the SPARTAN-IV program was born of necessity; after surviving twelve tours across eight worlds, she was recruited by Jun-A266 to be part of the first class of the newly formed Spartan branch. Unlike the Spartan-IIs, who were conscripted as children, Palmer chose this life as a seasoned veteran. Key Operations and Leadership During the initial discovery of Requiem, she worked
Palmer’s leadership was forged in the fire of the . Her transition to the SPARTAN-IV program was born
In one of her most controversial moments, Palmer attempted to assassinate Dr. Catherine Halsey under orders from ONI, resulting in the doctor losing an arm.
The Shield of Infinity: The Legacy of Commander Sarah Palmer
During the ambush on the Infinity at Zeta Halo, Palmer was last recorded escorting Captain Lasky to an escape pod, though her current status remains officially MIA . A Complicated Reputation Sarah Palmer - Character - Halopedia, the Halo wiki