The Sons of the Preserving Blade were an irregular militia formed by several hundred young Sangheili warriors who felt drawn to the cause of the Fallen separatist movement several years after the end of the Human-Covenant War. Their ranks mostly consisted of warriors who had been undergoing private training and education at clan keeps on Sanghelios and were moved by the Fallen movement to prevent the post-war government from allowing the human race to influence Sangheili affairs. Though they had no distinct leader, the group eventually solidified around four particularly skilled young warriors who became known as the Four Preserving Swords. In spite of the relative youth of most of their members, the Sons of the Preserving Blade proved to be a dedicated and effective fighting force and bec