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The document contains detailed maps and postcards of the country and has been kept by a family out of public view since the end of war.

And it reveals that even though Ireland was officially neutral during the conflict, Hitler still viewed the country as a target for invasion.

The Irish allowed German U-boats and submarines into their waters during the Second World War, but the booklet entitled Militargeographische Angaben uber Irland pinpoints key cities and other sites in Ireland for destruction.