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 was actually in the baggage train, concluded that the attack happened at the "start" of the battle. Regardless of when the baggage assault happened, at some point after the initial English victory, Henry became alarmed that the French were regrouping for another attack. The "Gesta Henrici" places this after the English had overcome the onslaught of the French men-at-arms and the weary English troops were eyeing the French rearguard ("in incomparable number and still fresh"). Le Fèvre and Wavrin similarly say that it was signs of the French rearguard regrouping and "marching forward in battle order" which made the English