Thought you might find this interesting. For other Mediaeval warfare info you can visit the De Rei Militari site- http://deremilitari.org/ "Most historians of the Hundred Years War see the battle of Sluys, fought on June 24, 1340, as the first major onslaught of this late medieval conflict between France and England. A victory for the English, this naval battle allowed Edward III to land on the continent, to gather his Low Countries’ allies to him and to besiege the town of Tournai, the nearest major French-controlled enclave. Although militarily it was only a minor setback, the English siege of Tournai failing as it would, the French fleet had been destroyed and it would take a number of years before France could again challenge the English for control of the channel. What caused this English victory and French defeat?After a brief look at the modern historical explanatiaons of the causes of victory and defeat, this article will examine contemporary perceptions of what led to Sluys’ result. It will show that for English, French, and Low Countries’ authors, there are different reasons given for victory and defeat at Sluys. Finally, it will show how Jean Froissart, in three different redactions of his Chroniques, used all three ‘nationalistic’ perceptions." http://deremilitari.org/wp-content/uploads/2014/03/devries2.pdf