“The sign of the wolf (or the wolf-pack) is clear enough in Greek age set confraternities such as the Athenian ejhbeia and the Spartan krupreia the adolescents in these peer- groups prepared for full warriorhood by behaviour that was exactly reversed from the norm: they prowled at night, were hidden and covert in their actions, used trick, trap, stratagem and ambush and all the techniques forbidden to the true adult warrior-hoplite, in his daylight discipline.
“However, these young warriors-in-training eventually would be reintegrated into their societies, while a “wolfish” activity or character, from Hittite times on (but especially well illustrated in the Germanic sources) defined an outlaw, one whose crimes had put him outside society, and who can be hunted like the wolf, i.e., be both “killer” and “to be killed”; cf. Germanic warg. Werewolf or man-wolf activity may not be simply solitary, as shown by a widely-recurring belief in destructive, night-roaming bands or confraternities of lycanthropes who had abjured the laws of society.
“These “secret bands” have also been connected to the German Wilde Jagd or Wutende Heer, legendary affiliates of Death and the Devil, and instances of bloodthirsty and destructive werewolf bands are also known in the Iranian sources and in Baltic and Slavic folklore.”
Excerpted from “Encyclopedia of Indo-European Culture” edited by J. P. Mallory, Douglas Q. Adams
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