Christian, it is indeed an great thing to learn that your father was awarded the U.S. Amry Silver Star... it is a distinction for which not many foreign soldiers have been recognized.
At one time, General Devers was the Commanding General of the 9th Infantry Division in which my father served.
Here is a photo that may interest you:
Photo courtesy of Denis Toomey
www.dogfacesoldiers.org
Sixth Army Group commander General Jacob Devers and French First Army commander General Jean de Lattre de Tasigny greet the citizens of Colmar, France after the city was liberated from four years of Nazi control in early February 1945.