Description: The construction work for Fort de Douaumont started in 1885 and the fort was continually reinforced until 1913. The fort is situated on some of the highest ground in the area. It has a total surface area of 30,000 square metres and is approximately 400 metres long, with two subterranean levels protected by a steel reinforced concrete roof 12 metres thick. The fort was equipped with numerous armed posts, a 155 mm gun turret, a 75 mm gun turret, several other 75 mm guns in flanking "Bourges Casemates" and numerous machinegun turrets.
Fort Douaumont had the reputation of being the strongest fort in Europe and virtually impregnable.