what medieva; church teachings are found in the "song of roland"?

Answer 1

Medieval epic French poem, nationalist in origin, and was slightly biased about the Saracens (Muslims).

QUOTE: Ganelon's action constitutes a betrayal of the emperor. Ganelon's friend Pinabel challenges Thierry to trial by combat; the two will fight a duel to see who's right. By divine intervention, Thierry, the weaker man, wins, killing Pinabel.
The Song of Roland is not a history book, but an epic poem which takes all sorts of liberties, making vivid heroes out of dusty names, making adversaries into the most revolting of villains, and throwing on all alike an air of grandeur. It does not give us facts--any quick comparison shows that it contradicts the records of history in a thousand places--but instead legend.
END QUOTE

Divine Intervention is the most prevalent theme and this was central doctrine to the Medieval Church. In the end, no matter who does what, God's will is done, hence Divine Intervention.