If you read the book about the "terrorist attacks" that have taken place on behalf of the German Empire 1914-1917 and thereby keeps the developments and events of the past about 15 years in mind, one discovers startling and equally frightening similarities.
Wrote really fast - ok some words I had to look up, because they very rarely used - but absolutely informative and never boring.
Well: Particularly the "amateur spy -and- sabotage troops of the emperor" does not come off in their efforts. She was quite successful - within their means - and has caused damage in very high altitude - only about $ 20 million, in an attack on the "Black Tom ammunition dump" - for its time a total madness! But they also have plenty of flops come that all was wonderfully documented in the book.
Worth reading !!