The Bras de Bronne (sometimes spelled "Bras de Brosne") is a small river in northern France whose 11 km course crosses the departement of the Pas-de-Calais.Its source is at the hamlet of Etreuille, near the village of Saint-Michel-sous-Bois. It flows through the communes of Humbert, Sempy, Aix-en-Issart, Marant, Marenl...