The purpose of an alliance is not simply for the sake of preventing an enemy from attacking you. Rather, importance lies in what one can obtain after the alliance. As well as your actions after the alliance.
Every single one of them died while furiously giving off the light that resided within them and that light is then inherited by the next person where it will go on to shine with an even greater radiance. And thus people are connected together... allowing us to work towards a better tomorrow.
People fall into darkness because they have lost sight of the true nature of the light within them. Unable to find that light they flounder desperately while suffering in agony, only to give birth to tragedy. And there is no greater cause of tragedy, no greater source of darkness, than warfare.