Finally Verdier withdrew by slow marches up the Ebro to Tudela, where he took post on August 17. He had lost in all over 3,500 men in his long-continued struggle with the heroic city. The Aragonese must have suffered at least as much, but the figures are of course impossible to verify. They said that their casualties amounted to no more than 2,000, but this must surely be an understatement, for Palafox says that by August 1 there were of his original 7,000 levies only 3,500 left under arms. Even allowing for heavy diminution by desertion and dispersion, this implies very serious losses in action, and these seven Aragonese battalions formed only a part of the garrison, which counted 13,000 men on August 13. Probably the unembodied citizens and peasants suffered in a still heavier proportion than troops which had received even a small measure of organization. If the whole losses came to 4,500 it would not be surprising--but nothing can be stated with certainty. Yet whatever were their sufferings, the Saragossans had turned over a new page in the history of the art of war. They had defended for two months an unfortified place, by means of extemporized barricades, retrenchments, and earthworks, and had proved their ability to resist even a formidable train of siege artillery. If the news of Dupont’s disaster had not arrived in time to save them, they would no doubt have succumbed in the end, as must any besieged place which is not sooner or later relieved from the outside. But meanwhile they had accomplished a rare feat: almost unaided by regular troops, almost destitute of trained artillerymen and engineers, they had held at bay a force which Napoleon at the commencement of the siege would have supposed to be equal to the task of conquering not only Aragon, but the whole eastern side of the Iberian Peninsula. SECTION III: CHAPTER III OPERATIONS IN THE NORTH: BATTLE OF MEDINA DE RIO SECO While Lefebvre-Desnouettes and Verdier were making their long series of attacks on Saragossa, matters were coming to a head in the north-west of Spain. The army of Galicia had at last descended into the plains, and commenced to threaten the right flank of Bessières and the communications between Burgos and Madrid. This forward movement was due neither to the Galician Junta, nor to the officer whom they had placed in command of their army, but to the obstinate persistence of Cuesta, who had not in the least learnt the lesson of caution from his defeat at Cabezon, and was eager to fight a pitched battle with all the forces that could be collected in Northern Spain.