The aggressive campaign was an easy and a brilliant one. Charles with his army entered Spain by the valley of Roncesvalles without encountering any obstacle. On his arrival before Pampeluna the Arab governor surrendered the place to him, and Charlemagne pushed forward vigorously to Saragossa. But there fortune changed. The presence of foreigners and Christians on the soil of Spain caused a suspension of interior quarrels amongst the Arabs, who rose in mass, at all points, to succor Saragossa. The besieged defended themselves with obstinacy; there was more scarcity of provisions amongst the besiegers than inside the place; sickness broke out amongst them; they were incessantly harassed from without; and rumors of a fresh rising amongst the Saxons reached Charlemagne. The Arabs demanded negotiation. To decide the king of the Franks upon an abandonment of the siege, they offered him “an immense quantity of gold,” say the chroniclers, hostages, and promises of homage and fidelity. Appearances had been saved; Charlemagne could say, and even perhaps believe, that he had pushed his conquests as far as the Ebro; he decided on retreat, and all the army was set in motion to recross the Pyrenees. On arriving before Pampeluna, Charlemagne had its walls completely razed to the ground, “in order that,” as he said, “that city might not be able to revolt.” The troops entered those same passes of Roncesvalles which they had traversed without obstacle a few weeks before; and the advance-guard and the main body of the army were already clear of them. The account of what happened shall be given in the words of Eginhard, the only contemporary historian whose account, free from all exaggeration, can be considered authentic. “The king,” he says, “brought back his army without experiencing any loss, save that at the summit of the Pyrenees he suffered somewhat from the perfidy of the Vascons (Basques). Whilst the army of the Franks, embarrassed in a narrow defile, was forced by the nature of the ground to advance in one long, close line, the Basques, who were in ambush on the crest of the mountain (for the thickness of the forest with which these parts are covered is favorable to ambuscade), descend and fall suddenly on the baggage-train and on the troops of the rear-guard, whose duty it was to cover all in their front, and precipitate them to the bottom of the valley. There took place a fight in which the Franks were killed to a man. The Basques, after having plundered the baggage-train, profited by the night, which had come on, to disperse rapidly. They owed all their success in this engagement to the lightness of their equipment and to the nature of the spot where the action took place; the Franks, on the contrary, being heavily armed and in an unfavorable position, struggled against too many disadvantages. Eginhard, master of the household of the king; Anselm, count of the palace; and Roland, prefect of the marches of