778 * August 15 - Battle of Roncevaux (Roncesvalles), in which Charlemagne's army suffers a terrible defeat at the hand of the Basques. Among those killed was Roland, lord of the Breton March; the 11th-century Song of Roland is loosely based on the events of this battle. * Charlemagne fights the Moors in Spain. * Widukind returns to Saxony from Denmark.