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
Why did the chicken cross the road? crosses "because chickens didn't exist yet." Some variants are both puns and references to the original, such as "Why did the duck cross the road?" "To prove he's no chicken". Other variations replace side with another word often to form a pun. Some examples are "Why did the chicken cross the playground? To get to the other slide" or "Why did the whale cross the ocean? To get to the other tide." A mathematical version asks, "Why did the chicken cross the Möbius strip?" "To get to the same side." Another class of variations, designed for written rather than oral