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 two-to-one". However, Clifford J. Rogers, professor of history at the United States Military Academy at West Point, has recently argued that archival records are too incomplete to substantially change his view that the English were outnumbered about 4–1. Juliet Barker also disagrees with Curry's arguments in the acknowledgements section of her 2005 book on Agincourt, saying: "Surviving administrative records on both sides, but especially the French, are simply too incomplete to support [Curry's] assertion that nine thousand English were pitted against an army only twelve thousand strong. And if the differential really was as low as three to four then