Captain Dr. Ralph E. Rosen with the 667th Coast Artillery in Germany

Hi, My grandfather was Captain Dr. Ralph E. Rosen. He was with the 667th Coast Artillery in Germany. He was called to active duty in February 1942. He saw combat in the North African Campaign, Italy, Southern France, the crossing of the Rhine, Germany and the liberation of Dachau. I was hoping that you may have some information about him, and I would greatly appreciate any assistance you have in finding out more about my grandfather. Thank you in advance for your kind assistance, Ilena

[Moderation Note: This new research question was split from the older discussion thread  Seeking roster for 45th Infantry Division ]