Posadskaya was stationed in a broken-down train station in Moscow during an assault made by the Germans in World War II, operating on her fellow comrades. As she treated a wounded soldier inside the Stalingrad train station with another Russian soldier in the room, she was apparently unaware that there were Germans both in the room downstairs and in the adjacent room. When Lt. Badanov arrived to relieve the squad with tank support, she offered him to help himself to whatever supplies he needs.
After the building shakes, a bomb landed nearby with enough force to make part of a wall to crumble which revealed those in Anna's room to a squad of Germans in the next room over. Posadskaya defended herself with her Mosin-Nagant, and when the Germans were killed, she told Lt. Badanov the way to Pvt. Bagramyan's observation post, bidding him good luck. She is not seen in the game again.