TracesOfWar needs your help! We miss photos of important sights in the Netherlands, Belgium, France and Germany. Submit your photos to and it will be published!

Maginot Line - Immerhof Fortress

PO (Petite Ouvrage) A10 Immerhof was part of the Secteur fortifié de Thionville and is one of the smaller fortresses of the sector. The garrison of the fortress consisted of soldiers from different regiments. The fortress surrendered to the Germans on 25th of June 1940 without fierce combat.

After the war the fortress was kept in active service by NATO, until France retreated the alliance in 1966. Since 1974 it is open for public only by guided tours.

Do you have more information about this location? Inform us!


  • Text: Kees Boks
  • Photos: Kees Boks