This was very interesting. I remember the first time I ever felt a sense of unity. It was when I was part of a play at school and the togetherness I felt of all of us working hard, contributing to the preparation of the play was such an amazing, enlightening, uplifting feeling. I also felt it intensely as a member of my tennis team in college. It makes so much sense that soldiers would feel this sense of brotherhood and unity during war.
Take a look.