Festungsfront Oder-Warthe-Bogen

The Festungsfront Oder-Warthe-Bogen (Fortified Front Oder-Warthe-Bogen), also called the Festung im Oder-Warthe-Bogen or Ostwall (East Wall), and in Polish the Międzyrzecki Rejon Umocniony, MRU (Międzyrzecz Fortification Region), was a fortified military defence line of Nazi Germany between the Oder and Warta rivers, near Międzyrzecz. The part around Międzyrzecz (Meseritz) has been colloquially referred to as the Regenwurmlager. Built in 1934–44, it was the most technologically advanced fortification system of Nazi Germany, and remains one of the largest and the most interesting systems of this type in the world today. It consists of around 100 concrete defence structures partially interconnected by a network of tunnels. Some of the forts and tunnels are available for visiting.

Międzyrzecki Rejon Umocniony
System of tunnels
Międzyrzecki Rejon Umocniony
Coordinates: 52°22′17″N 15°30′21″E
Country Poland
Voivodeship Lubusz
Built1934–44
Plan of MRU

The most interesting part is the central section, which begins in the south with the so-called Boryszyn Loop near the village of Boryszyn and extends about 12 km to the north. Another interesting part of MRU is located in Pniewo (Gmina Międzyrzecz). In the central section the bunkers are interconnected with an system of tunnels, 32 kilometres long and up to 40 metres deep. In the underground system there are also railway stations, workshops, engine rooms and barracks.

It is also the largest European underground bat refuge, giving shelter to some 35,000 bats of 12 species in the wintertime.

History

The design works of the fortified defence line started in Germany in 1932. The first stage, until 1935, included constructing of water obstacles and 12 light bunkers. Adolf Hitler visited the construction site in the end of 1935. The end of works was scheduled for 1951.

The Soviet army reached the defence line in the course of the Vistula–Oder Offensive in January 1945, before the Germans could deploy troops; the line was broken in three days.

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gollark: Make it rec room again and add the transistor emojicon1
gollark: Just program your own game in emacs.
gollark: It still gets updates IIRC.
gollark: Just play nethack.

See also

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