Châlons-en-Champagne (French pronunciation: [ʃɑlɔ̃ ɑ̃ ʃɑ̃paɲ]) is a city in the Grand Est region of France.

The city was a Gallic and later a Gallo-Roman settlement known in Latin as Catalaunum, taking its name from the Catalauni, a Belgic tribe dwelling in the region of modern Champagne.

The Catalaunian Fields was the site of the battle of Châlons in 451 which turned back the westward advance of Attila.

Additionally, Châlons is connected with the Champagne-TGV station, near Reims, with high speed trains going to Lille, Nantes, Rennes and Paris-Charles de Gaulle Airport.

The initial purpose was simply for practising military manoeuvres, but it quickly turned into a showcase of the French Imperial Army, a theatrical propaganda display, where French citizens could meet the army and watch parades.