It is part of the second ring of fortifications around the city of Belfort in northeastern France.

[1] The rectangular fort initially mounted fifty artillery pieces and was garrisoned by more than 650 men.

Underground galleries shielded with concrete were built beneath the fort during the First World War.

These galleries connected various portions of the fort to the troop shelter, which was itself concreted.

[3] In June during the Battle of France, 400 men sought shelter at Fort de Roppe, staying for three days before surrendering.