chunk: The Franks discover Ganelon's betrayal and keep him in chains until his trial, where Ganelon argues that his action was legitimate revenge, not treason. While the council of barons assembled to decide the traitor's fate is initially swayed by this claim, one man, Thierry, argues that, because Roland was serving Charlemagne when Ganelon delivered his revenge on him, Ganelon's action constitutes a betrayal.
  Ganelon's friend Pinabel challenges Thierry to trial by combat, in which, by divine intervention, Thierry kills Pinabel. The Franks are convinced by this of Ganelon's treason, thus, he is torn apart by having four galloping horses tied one to each arm and leg and thirty of his relatives are hanged.