The "Song of Roland" is an epic poem from the 11th century, considered one of the oldest and most significant works of French literature. It tells the story of Roland, a brave knight and the nephew of Charlemagne, who defends the rear guard of the Frankish army during a battle against the Saracens in Spain. The poem highlights themes of heroism, loyalty, and sacrifice. The narrative centers on the betrayal of Ganelon, who conspires against Roland and leads to a tragic ambush. As Roland faces overwhelming odds, he blows his horn, the Olifant, to call for help, but it is too late. The poem serves as a reflection of the values of chivalry and the struggles between Christians and Muslims during the Middle Ages.