With a heavy armament for a petit ouvrage it successfully defended its neighbors against German attack during the Battle of France.

Blocks 1, 2 4 and 5 are linked by deep underground galleries, which also provide space for barracks, utilities and ammunition storage.

[12] The Casernement de Zimming provided peacetime above-ground barracks and support services to Laudrefang and other positions in the area.

On 21 June 1940 Laudrefang supported neighboring ouvrages Einseling and Teting as they came under attack[5] with an estimated 5000 81mm mortar rounds.

The German infantry attacks were suspended in favor of an artillery barrage at Laudrefang, firing between 3000 and 3500 rounds at the ouvrage.