Tactically the battle allowed Edward to land his army, which went on to besiege Tournai, a city in Flanders loyal to Philip VI, although the campaign ended in failure. In the aftermath of the battle, the French suffered an invasion scare and rushed troops to their coastal districts. Philip ordered that Barbavera be arrested for desertion. Strategically the victory had little effect. It gave the English fleet naval supremacy in the English Channel, but Philip had greater resources than Edward and was able to rapidly rebuild the French navy around the ships which had escaped and those which were not involved in the battle. Within a month a French squadron under their new admiral, Robert de Houdetot, captured 30 merchantmen from an English wool convoy and threw the crews overboard. French ships continued to capture English merchantmen in the North Sea and to run men and munitions to their allies, the Scots. Nevertheless, the naval historian Graham Cushway says the loss of mariners economically devastated Norman and Picard maritime trade. An almshouse was set up at Leure (near Harfleur) to care for survivors too injured to work as seamen.