"Le Boudin" (French pronunciation: [lə budɛ̃]), officially "Marche de la Légion Étrangère" (English "March of the Foreign Legion"), is the official march of the Foreign Legion. "Le Boudin" is a reference to boudin, a type of blood sausage or black pudding. "Le boudin" colloquially meant the gear (rolled up in a blanket) that used to be carried atop the backpacks of Legionnaires.