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Ruhr - Wikipedia, the free encyclopedia
You +1'd this publicly. UndoThe Ruhr, by German-speaking geographers and historians more accurately called Ruhr district or Ruhr region ... This geological feature played a decisive role in the development of coal mining in the Ruhr. .... WWII Ruhr Bombing Operations ...
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League of Nations
You +1'd this publicly. UndoIts main importance was that it had valuable coal mines there which both the ... Vilna stayed in Polish hands until the outbreak of World War Two. ... the French and the Belgium's invaded the Ruhr – Germany's most important industrial zone. ...