Charlemagne's rear guard got ambushed in the Pyrenees; history's most famous military embarrassment dressed as legend.
means The 778 ambush of Charlemagne's Frankish army at a Spanish mountain pass, transformed by legend into Roland's heroic last stand and immortalized in medieval epic poetry.
from Charlemagne retreated from failed Iberian conquest through the Pyrenees; Basque raiders or Muslim forces attacked the column near Roncevaux. The Chanson de Roland (12th century) mythologized it three centuries later, swapping tactical defeat for glorious tragedy and making a minor skirmish the template for Christian-vs-infidel heroism.
the chanson de roland — 12th-century French epic that turned a rear-guard skirmish into Christendom's defining myth
charlemagne's iberian campaign — 778 military venture meant to secure Spain; failed and became his only significant defeat