Atonement Movie What Is The Role Of The Character (the Dying Patient) In Atonement (movie) That Briony Looks After?

What is the role of the character (the dying patient) in Atonement (movie) that Briony looks after? - atonement movie

I do not understand the role of character in the film Atonement, when Briony is working as a nurse and head nurse, after talking a wounded soldier - one with him - as she knows, asked in French. There was someone who knows? and what was the meaning of the scene? Briony something died with the patient? (Name of Briony, because the head nurse that Briony is not his name THA patients, as we want to know a nurse Tallis). Who the meaning of the scene? hehe