The absence of the situation usual for them causes them to form a community between each other similar to the one they are used to. But this “community” is unstable and temporary, they are just held together by the situation and as soon as the situation changes and they split up, they realize that they aren’t a part of anything anymore, the community they grew up in evolved without them, making it unable for them to fit in again. They get stuck and it is impossible for them to get back into the normal flow. One of the most long term and destructive effects war has on the soldiers is that it excludes them from the rest of the world.
The dramatic change in one’s environment and lifestyle, being split from the situation one’s used to can cause the loss of identity. This is the case with one of O’Brien’s most dynamic characters, Mary Anne. She is introduced in the middle of the novel as the girlfriend of one of the soldiers, Mark Fossie. He