Operation Paperclip was a secret program of the Joint Intelligence Objectives Agency (JIOA) largely carried out by special agents of Army CIC, in which more than 1,600 German scientists, engineers, and technicians, such as Wernher von Braun and his V-2 rocket team, were taken from Germany to the United States, for U.S. government employment, primarily between 1945 and 1959. Many were former members, and some were former leaders, of the Nazi Party.
The primary purpose for Operation Paperclip was U.S. military advantage in the Soviet–American Cold War, and the Space Race. The Soviet Union was more aggressive in forcibly recruiting more than 2,200 German specialists—a total of more than 6,000 people including family members—with Operation Osoaviakhim during one night on October 22, 1946. – Wikipedia