Nothing, he was a horrible awful hobo with no jobs. Now get a life and read a book.
Wernher von Braun
Wernher von Braun
A number of German rocket scientists came to the US after the Second World War, but the most well-known of them was SS Sturmbannführer Dr Baron Wernher Magnus Maximilian von Braun, usually called just Wernher von Braun.
Albert Einstein Wernher von Braun, rocket scientist and architect of the US space program
Wernher von Braun .
Von Braun surrendered to American soldiers on 1945 May 2. Approval for his transfer to the USA was approved on June 20, and he arrived there in September.
Many of the scientists were taken to the US where they could use their talents to advance US interests . For example , Wernher von Braun helped the US develop it's rocket technology .
That was Dr. Wernher von Braun. (VAIR-nuhr fon brown)
Von Braun was brought to the US as part of Operation Paper Clip, which brought German scientists to the US, initially without their families, as part of the beginning of the Cold War confrontation between the US and the USSR.
By "your" I assume you mean America's. There were a bunch of German rocket scientists repatriated to the US after World War II, but the one you're probably thinking of is Wernher von Braun.
Wernher Magnus Maximilian Freiherr von Braun(March 23, 1912 - June 16, 1977), a German rocket physicist and astronautics engineer, became one of the leading figures in the development of rocket technology in Germany and the United States.Wernher von Braun was probably the preeminent rocket engineer of the 20th century, the US would not have been able to get to the moon without him.
Militarily in WWII they had almost no impact. They were costly to build and had a minimal effect in damage. However, the V2 provided the basis of post-war ballistic missle designs for the USSR and the US and its creator, Wernher von Braum, came the US and worked for NASA as the director of the marshall space flight center.