It was not merely in peaceful ways that the expansion of the civic power may be traced at this time. For the long-drawn misery of the Hundred Years' War began in 1337, and nine years afterwards the King had to hurry to Rouen to oppose the advance of Edward III., who was already at Caen and threatened the capital of Normandy. All the woods of Bihorel, says the chronicler sadly, had to be cut down to make "hedges and palisades" around the menaced city. After the defeat of Cressy, the men of Rouen had a still sharper taste of the realities of war, for the militia of the town, who had been hurried forward to reinforce the broken army of the King, while their comrades at home were strengthening the defences of Rouen, came up with an English regiment near Abbeville, and contributed a heavy share to that loss of "six thousand men of the communes" which Froissart chronicles. That the town stood in grave need of all these warlike preparations, as well against internal disorders as against enemies from without, may be imagined from the disquieting scenes of 1356, when King John came to the castle with a hundred men-at-arms, and arrested with his own hands Charles le Mauvais, King of Navarre, and four of his suite who were falsely accused of treason. The Count of Harcourt, the Sire de Graville, Maubue de Mainnemare, and Colinet Doublet, were all beheaded on the Champ du Pardon that night in April, while the King looked on. The resistance of the citizens to this high-handed act of injustice was only quelled by the spreading of the news of the King's presence. But Philip, the brother of the King of Navarre (who had been sent to prison near Cambrai), took instant vengeance by ravaging the suburbs of Rouen, and calling in the Duke of Lancaster's English troops. It was in resisting this allied attack that the French King was beaten and taken prisoner at Poitiers. As soon as Charles le Mauvais got his freedom, two years later, he returned to rehabilitate the memory of his friends in Rouen. The body of the Count of Harcourt had been secretly removed from the public gibbet by his family. The three other corpses were taken down and borne to the Cathedral with great ceremony, where their innocence of treason was solemnly proclaimed. Excited by this open defiance of authority, the populace of the town rose against the Dauphin's men, seized the castle, and destroyed the Priory of St. Gervais with which they had a private quarrel of their own on the burning question of taxes. The commune only secured amnesty for its offences, and reconciliation with the Regent, by paying 3000 florins as a fine.