How title "Band of Brothers" relates to novel

The title "Band of Brothers" relates well to the enviroment of the book. The book surrounds a group of soldiers during World War II, known as E-Company. The starting point is the very first day of boot camp, and runs all the way to the actual battles they take part in. Some points recall interviews with the soldiers after the war and they provide description of the men in their regiment. Over time, E-Company loses the sense of fending for themselves, to being broken into functioning as a whole unit. The E-Company overtime becomes a "Band of Brothers," as the title of the novel entails.