Billig was approved for construction by CORF, the Maginot Line's design and construction agency, in June 1930 and became operational by 1935, at a cost of 65 million francs. The contractor was Ossude of Paris.
Description
This gros ouvrage is unusual in having one entrance for both ammunition and personnel. It lacks the large "M1" magazine of other gros ouvrages. The dogleg-shaped layout is relatively short for a gros ouvrage, with less than of underground gallery at an average depth of from the entrance to the farthest combat block. Like all gros ouvrages, Billig was provided with a 60 cm railway running through the gallery system to provide materiel. The railway continued out the single entrance and connected to the railway system paralleling the front in the rear zones.
Mixed entry: Inclined ramp, two automatic rifle/anti-tank gun embrasures. The mixed entry combines ammunition and personnel access, which is usually separated in a gros ouvrage.
Block 1: Infantry block with one JM/AC47 embrasure, one machine gun embrasure and two automatic rifle cloches.
Block 3: Infantry block with one JM/AC37 embrasure, one JM embrasure and two GFM cloches.
Block 4: Artillery block with two 75mm gun embrasures, one 75mm gun turret, one grenade launcher cloche and one GFM cloche.
Block 5: Artillery block with two 75mm gun embrasures and one GFM cloche.
Block 6: Artillery block with 81mm mortar turret and one GFM cloche.
Block 7: Observatory block with one GFM cloche, one grenade launcher cloche and one periscope cloche.
Casemates and shelters
Several small blockhouses with machine guns and anti-tank guns were located around Billig. The Casernement d'Elzange provided peacetime above-ground barracks and support services to Billig and other ouvrages in the area.
Manning
The manning of the ouvrage in 1940 comprised 521 men and 16 officers of the 167th Fortress Infantry Regiment and the 151st Position Artillery Regiment. The units were under the umbrella of the 42nd Fortress Corps of the 3rd Army, Army Group 2.
History
Billig was not subjected to significant attack by the Wehrmacht in 1940, although an aerial bomb penetrated the 81mm mortar turret in Block 6 on 15 June, killing two. The area around Billig did not become active until late June 1940, but German infiltration persisted until the June 25 armistice. Billig fired 2030 75mm shots in support of Hackenberg on the 24th. After the armistice Billig was used for explosive effects testing by the Germans. Blocks 1 and 2 and the magazine of Block 5 were subjected to projectile penetration tests and gas explosions. Block 2's turret was blasted into the air, falling back into its opening. Billig was assaulted by the U.S. 90th Infantry Divisionin September 1944 and captured after two days of fighting, using close-assault tactics. Following capture, Billig was used for ordnance testing by the U.S. Army. Following the war, the Maginot Line was viewed as a means of slowing an advance by Warsaw Pact forces and most of the northeastern positions were renovated and rearmed. Replacement of 75mm guns with 105mm guns was proposed for Billig. However, the program was abandoned, and after a period of routine maintenance, Billig's status was lowered to inactive reserve, and finally abandoned. Billig is abandoned and vandalized, with openings closed off to prevent access. The above ground installations remain visible.
