After her vicious fight with Cinder, using her newly acquired Winter Maiden powers, Winter was badly injured and taken to the Atlesian Military Hospital to recover.

After weeks of recovering, Winter would be discharged from the hospital and allowed to return to the Atlesian Military Base. But upon her return, she was blindsided by being told that she would be being transferred to Mantle to work at the security base

Winter: Wh-What? General Ironwood, I do not understand. Why are you transferring me to Mantle? I am your second in command, I… I've done so much for Atlas and even fought nearly to death to stop Cinder Fall.