Hi, I am not sure your Peter is the one I am looking for, but who knows. Peter would have had a sister named Anna. She married Heinrich Fuchs. She came to the US from Haarskirchen, Germany. Originally settling in Chicago and later moving to Wisconsin.
All I know is that she had a brother named Peter, I am unaware of any other siblings at this time. Peter did serve in the military, my aunt has a photo of him atop a horse in military dress.
Maybe we can help each other if we have the same firstname.lastname@example.org