Somme (river) invasion fleet of William the Conqueror assembled in the Bay of the Somme, at Saint-Valery-sur-Somme. The river also featured in the 1346 withdrawal of Edward III of England's army, which forded the river at the Battle of Blanchetaque during the campaign, which culminated in the Battle of Crécy. Crossing the river also featured prominently in the campaign which led to the Battle of Agincourt in 1415. In 1636, a Spanish army led by Thomas Francis, prince of Carignan, crossed the Somme defeating a French army during the Thirty Years War threatening Paris. Most famously, the Battle of the Somme, during
Battle of Agincourt of nine major northern towns were killed, often along with their sons, relatives and supporters. In the words of Juliet Barker, the battle "cut a great swath through the natural leaders of French society in Artois, Ponthieu, Normandy, Picardy." Estimates of the number of prisoners vary between 700 and 2,200, amongst them the Duke of Orléans (the famous poet Charles d'Orléans) and Jean Le Maingre (known as Boucicault), Marshal of France. Although the victory had been militarily decisive, its impact was complex. It did not lead to further English conquests immediately as Henry's priority was to return to England, which