Which sentences in this excerpt from Ernest Hemingway's "In Another Country" reflect the theme of the psychological alienation caused by war?

We were all a little detached, and there was nothing that held us together except that we met every afternoon at the hospital. Although, as we walked to the Cova through the tough part of town, walking in the dark, with light and singing coming out of the wine-shops, and sometimes having to walk into the street when the men and women would crowd together on the sidewalk so that we would have had to jostle them to get by, we felt held together by there being something that had happened that they, the people who disliked us, did not understand.

These sentences represent the alienation caused by war.