Gros Ouvrage

Some articles on gros ouvrage, gros ouvrages:

Ouvrage Billig - 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 1,000 metres (3,300 ft) of underground gallery at an average depth of 30 metres (98 ft) from the entrance to ...