See Fortified Sector of Haguenau for a broader discussion of the Haguenau sector of the Maginot Line. Hochwald Block 9

Hochwald was one of the most active ouvrages during the Phoney War of 1939–1940. On 8–9 October 1939, Hochwald fired in support of French patrols, revealing deficiencies in gun mounts and ammunition.[1] In November the ouvrage fired on German minelayers. During the Battle of France in June 1940, Hochwald remained unmolested until 16 June, when it fired on Germans moving toward Lembach and received artillery fire and Stuka attacks in return. Attacks came again on the 20th, and Hochwald fired in support of Lembach. More aerial attacks followed on the 22nd.

In 1944, the retreating Germans blew up blocks 1, 3 6 and 16, and all three entrance blocks, as well as all turrets.[2] In 1944 Hochwald (renamed Werk Hochwald) was used as an underground factory.[3]

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. However, in 1956, Hochwald was transferred to the French Air Force for use as an air defense command center. New underground galleries were built in the rear (i.e., near the entrance blocks), and were even provided with an internal machine gun port.[4] The facility was briefly known as Ouvrage H before its designation as Base Aérienne 901 Drachenbronn.[5]