Her first husband was a wealthy Austrian arms manufacturer, who hung out with Hitler and Mussolini.
She even said in her autobiography that she had had Hitler over to her home for a dinner party. She was pretty smart, and over all the dinner table conversation she learned a great deal about weapons technology.
She understood that the main problem with submarine torpedoes at the time was they could be jammed at frequency. So she and a musician came up with the idea to frequency hop using a device based on a player piano.
Hitler was supposedly obsessed with her. He had a copy of her 1933 movie "Ecstasy" and he played it over 100 times. Don't know if anyone has ever seen the movie, but it was shocking for the time. She is naked in part of it, and it was the first movie to depict a woman in orgasm. And she was really naked in the film, not implied naked.
No wonder Hitler watched it so many times.
She escaped Austria and made it to the US, and became a famous actress of course. But she also raised millions in War Bonds - $7,000,000 in just one night - another record.