 In 1944 Hochwald (renamed "Werk Hochwald") was used as an underground factory.With the formation of NATO, French interest in a renewed fortification system against a Warsaw Pact invasion caused the renovation of most of the larger Maginot fortifications by the 1950s.Hochwald joined Schoenenbourg, Four-à-Chaux and Lembach in a system called the "Môle de Haguenau", with work at Hochwald proceeding in 1952 to repair the war damage.