His army never reached farther than Saragossa. He was recalled to France by a revolt of the recently conquered Saxons, and the "Battle of Roncesvalles" is the historic monument of the ill-starred attempt. The battle in itself was insignificant. No action of such small importance has ever been invested with such a glamour of romance, nor the theme of so much legend and poetry. It has been called the Thermopylae of the Pyrenees, because of the personal valor displayed, and the tragic death of the two great Paladins (as the twelve Peers of Charlemagne were called) Roland and Olivier. The _Chanson de Roland_ was one of the famous ballads in the early literature of Europe, and Roland and Olivier were to French and Spanish minstrelsy what the knights of King Arthur were to the English. The simple story about which so much has been written and sung is this: As the retreating army of Charlemagne was crossing the Pyrenees, the rear of the army under Roland and Olivier was ambuscaded in the narrow pass of Roncesvalles by the Basques and exterminated to a man. These Basques were the unconquerable mountain tribe of which we heard so much in the early history of Spain. They had been on guard for centuries, keeping the Franks back from the Pyrenees. They may have been acting under Saracenic influence when they exterminated the rear-guard of Charlemagne's army. But it was done, not because they loved the Saracen, but because they had a hereditary hatred for the Franks. Mediaeval Europe never tired of hearing of the Great Charles' lament over his Roland: "O thou right arm of my kingdom,--defender of the Christians,--scourge of the Saracens! How can I behold thee dead, and not die myself! Thou art exalted to the heavenly kingdom,--and I am left alone, a poor miserable King!" CHAPTER XII. The tide which had flowed over southern Spain was a singular mixture of religious fervor, of brutish humanity, and refinements of wisdom and wickedness. No stranger and more composite elements were ever thrown together. Permanence and peace were impossible. Nothing but force could hold together elements so incongruous and antagonistic. As soon as the hand of Abd-er-Rahman I. was removed disintegration began. Clashing races, clans, and political parties had in a few years made such havoc that it seemed as if the Omeyyad dynasty was crumbling.