My childhood best friend's grandfather fought for Germany in WWI also. He told my friend how he remembered hiding under a bush when he found out the war had ended (saw some allied planes flying over apparently). He was a neat old guy. Used to drink PBR at room temperature and was a very talented carpenter/wood worker. His grandmother was a great cook, but I only really liked her baking. She would make big soft pretzels that were better than anything you can find today. Didn't care much for her other cooking (although I'm sure it was good), but that's just because most everything had vinegar in it (Sauerbraten, German potato salad, etc.) and I'm just not a fan of vinegar.My Mom's stepfather, I called him Opa, was a in the Luftwaffe in WWI and was awarded the Iron cross. I have it. I'll take a pic of it and post, will have to search a little for it.
They came to the US in 1936, I should say they fled due to being Jewish. He kept his German military service a secret. I only found out because I was being nosey and was searching through some old boxes when I was about 15, after he had already passed. I brought the wooden box with the medal in it, showed it to my grandmother and asked her what it was. I never saw her so upset with me in my life as she was in that moment. He never wanted his grandchildren to know that he fought against the US. He felt betrayed by Germany, rightly so, and truly loved America for giving him and his family a second chance in life.