Help me ID this German movie

I remember seeing a movie in German class back in high school.
It’s a German language(and produced) film. It appeared to have been filmed in the 1980’s, and it started out in WW1 trench line. The Main character is wounded in an attack, and spends some time in a coma(10 years?). He wakes up and has pyshic abilities, and somehow this plays into the rise of the Nazi party. I can’t remember if he predicts it or sees it happening and knows the outcome of it, or if he’s manipulated by the Nazis.

Has anyone seen this film? What is the name of it?