Festung is a generic German word for a fortress. Whilst it is not in common usage in English it is used in a number of historical contexts involving German speakers:
For historical fortresses in Austria, Germany or Switzerland
As part of the excuse given by the Wehrmacht for the slow progress of the Siege of Warsaw
For German WWII strongholds which were to be held at all costs, especially towards the end of the war:
Stalingrad (Festung Stalingrad)
Warsaw (Festung Warsaw) see also the Warsaw Uprising
Kolobrzeg (Festung Kolberg)
Wrocław (Festung Breslau)
Budapest (Festung Budapest)
For entire countries such as Norway which were heavily fortified in WWII.
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Festung is a generic German word for a fortress. Whilst it is not in common usage in English it is used in a number of historical contexts involving German speakers:
For historical fortresses in Austria, Germany or Switzerland
As part of the excuse given by the Wehrmacht for the slow progress of the Siege of Warsaw
For German WWII strongholds which were to be held at all costs, especially towards the end of the war:
Stalingrad (Festung Stalingrad)
Warsaw (Festung Warsaw) see also the Warsaw Uprising
Kolobrzeg (Festung Kolberg)
Wrocław (Festung Breslau)
Budapest (Festung Budapest)
For entire countries such as Norway which were heavily fortified in WWII.
http://dictionary.babylon.com/festung/
Recogne
province in Luxembourg
http://thesaurus.babylon.com/recogne
http://www.pegww2.net/Pages/Recogne.htm
After the Battle of the Bulge, Recogne was chosen as the resting place for German soldiers.
What language is it? "Festung" is German for fortress. I don't know what "recogne" means in any language.