After the capture of Dunkirk all the seaports as far as Sluys were taken by the English, who then marched to Ypres, to which town they at once laid siege, and were joined by twenty thousand men from Ghent. Their own number had swollen considerably by the arrival from England of many knights and men-at-arms, besides numbers of foot-men, attracted as much by the news of the great spoil that had been captured in the Flemish towns as by the exhortations and promises of the clergy.