In February 1945,
Supreme Headquarters Allied Expeditionary Force (SHAEF) set up
T-Force, or Special Sections Subdivision, which grew to over 2,000 personnel by June. T-Force examined 5,000 German targets, seeking expertise in synthetic rubber and oil catalysts, new designs in armored equipment, V-2 (rocket) weapons, jet and rocket propelled aircraft, naval equipment, field radios, secret writing chemicals, aero medicine research, gliders, and "scientific and industrial personalities". When large numbers of German scientists began to be discovered by the advancing Allied forces in late April 1945, the Special Sections Subdivision set up the Enemy Personnel Exploitation Section to manage and interrogate them. The Enemy Personnel Exploitation Section established a detention center,
Camp Dustbin, first near Paris and later in
Kransberg Castle outside Frankfurt. The US
Joint Chiefs of Staff (JCS) established the first secret recruitment program, called Operation Overcast, on July 20, 1945, initially "to assist in shortening the
Japanese war and to aid our postwar military research". The term "Overcast" was the name first given by the German scientists' family members for the housing camp where they were held in
Bavaria. In late summer 1945, the JCS established the JIOA, a subcommittee of the Joint Intelligence Community, to directly oversee Operation Overcast and later Operation Paperclip. The JIOA representatives included the army's director of intelligence, the chief of naval intelligence, the assistant chief of Air Staff-2 (air force intelligence), and a representative from the
State Department. In November 1945, Operation Overcast was renamed Operation Paperclip by
Ordnance Corps officers, who would attach a
paperclip to the folders of those rocket experts whom they wished to employ in the United States. The project was not initially targeted against the Soviet Union; rather the concern was that German scientists might emigrate and continue their research in countries that remained neutral during the war. Much US effort was focused on
Saxony and
Thuringia, which on July 1, 1945, became part of the
Soviet occupation zone. Many German research facilities and personnel had been evacuated to these states before the end of the war, particularly from the Berlin area. The USSR then relocated more than 2,200 German specialists and their families—more than 6,000 people—with
Operation Osoaviakhim during one night on October 22, 1946. In a secret directive circulated on September 3, 1946,
President Truman officially approved Operation Paperclip and expanded it to include 1,000 German scientists under "temporary, limited military custody".
News media revealed the program as early as December 1946. On April 26, 1946, the Joint Chiefs of Staff issued directive
JCS 1067/14 to General Eisenhower instructing that he "preserve from destruction and take under your control records, plans, books, documents, papers, files and scientific, industrial and other information and data belonging to ... German organizations engaged in military research"; ==Osenberg List==