At the time of its construction, Fort des Ayvelles, controlled Meuse and the railway line linking what city in the Grand Est region of France, that lies 129 km east-northeast of Paris?
Fort des Ayvelles: The Fort des Ayvelles, also known as the Fort Dubois-Crancé, is a fortification near the French communes of Villers-Semeuse and Les Ayvelles in the Ardennes, just to the south of Charleville-Mézières. Fort des Ayvelles:  At the time of its construction the fort controlled the Meuse and the railway line linking Reims, Montmédy, Givet and Hirson. Reims: Reims ( ; also spelled Rheims; ] ), a city in the Grand Est region of France, lies 129 km east-northeast of Paris.
Reims