I can't see a hyphen on the german poster, do you have a source for your request? I can see the title on Wikipedia with hyphen, on amazon without on moviepilot without, I can't find the official site for the moment

Here's the movie on the offical website of "20th Century Fox Germany":

http://www.fox.de/valkyrie

It says: "Operation Walküre - Das Stauffenberg Attentat" -> without a hyphen!

so that's cleared, thanks janar

Samara, thank you for taking care of the topic! Obviously, many sources follow the wrong spelling. "False" means that in German it is a grammatical mistake to use a space instead of a hyphen at this point. It seems the producers were unaware of this rule. The official website no longer exists, even in the Internet Archive I could not find any archived version of the official website. IMDb mentions a correct spelling, but that is not an official source. I have no idea how we can solve the issue. Maybe it would be better to leave the spelling, even if it contains a mistake. I know there are more examples with grammatically incorrect spellings.

https://www.duden.de/sprachwissen/rechtschreibregeln/bindestrich I'm honest even I'm german I can't see if here a hyphen is necessary

Other German related sources are:

• Wrong usage of blanks: https://de.wikipedia.org/wiki/Leerzeichen_in_Komposita
• Right usage of hyphens: https://de.wikipedia.org/wiki/Durchkopplung

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