In order to be someone's friend, one must establish some form of closeness.
True closeness is the first, great step in a good friendship.
There are two ways to develop true closeness, ordeal and competition. Ordeal can best be defined as the experience that one endures with a friend. The guys at the office are good friends because they understand all the hand work and networking that each one of them had to go through. By comparing their pasts, the office workers can relate, and thus establish a basic good friendship with the others. The soldiers, on the other hand, train together for weeks at a time and experience something slightly different.