Fort Vaux

Fort Vaux, in Vaux-Devant-Damloup, Meuse, France, was a polygonal fort forming part of the ring of 19 large defensive works intended to protect the city of Verdun. Built from 1881 to 1884 for 1,500,000 francs, it housed a garrison of 150 men. Vaux was the second fort to fall in the Battle of Verdun after Fort Douaumont, which was captured by a small German raiding party in February 1916 in the confusion of the French retreat from the Woëvre plain. Vaux had been modernised before 1914 with reinforced concrete top protection like Fort Douaumont and was not destroyed by German heavy artillery fire, which had included shelling by 16-inch howitzers. The superstructure of the fort was badly damaged but the garrison, the deep interior corridors and stations were intact when the fort was attacked on 2 June by German Stormtroops.

Source: Wikipedia