Mark 14:43

All the synoptic writers apparently repeated that Judas was one of the Twelve, even though the reader already knows this, to stress the tragedy of Jesus’ betrayal. [Note: Gould, p. 273.] Judas guided the mob (Acts 1:16) that had come with authority from the Sanhedrin. Part of the crowd consisted of Jewish temple police (Luke 22:52) and Roman soldiers (John 18:12). The police carried clubs and the soldiers short swords.