. . "The position of Assassin leader was given to any member of the Assassin Brotherhood who had received leadership over an or, during the 20th century, the entire Order. Before the 20th century, contact between countries was difficult and almost non-existent, resulting in the various branches of Assassins each having their own leader rather than being united under a single individual. On some occasions, these Assassin leaders were given the honorific of Mentor, having proven they were wise enough, and after they had trained a high number of Assassin apprentices. During the 20th century, when contact between countries was stable and common, the Assassin Brotherhood was united under a single leader, who was from then on known as the Mentor only."@en . . . . . . "Assassin leader"@en . . "The position of Assassin leader was given to any member of the Assassin Brotherhood who had received leadership over an or, during the 20th century, the entire Order. Before the 20th century, contact between countries was difficult and almost non-existent, resulting in the various branches of Assassins each having their own leader rather than being united under a single individual. On some occasions, these Assassin leaders were given the honorific of Mentor, having proven they were wise enough, and after they had trained a high number of Assassin apprentices."@en .