The division was first established by
FBI Director J. Edgar Hoover in 1939 as the
General Intelligence Division, to handle foreign counterintelligence and other intelligence related investigations. In 1941, the unit was renamed the
National Defense Division. In 1943, the division's name was once again changed, this time to
Security Division. After 10 years of operating as the Security Division, the unit was renamed as the
Domestic Security Division in 1953. In 1973, the organization became the
Intelligence Division and in 1976 transferred some of its responsibilities, including domestic terrorism investigations, to the FBI's
Criminal Investigative Division. In 1993, the unit was renamed the
National Security Division (NSD). The following year, the responsibility for domestic terrorism moved back to the NSD. In 1999, the FBI's
Counterterrorism Division was created and took over responsibility for terrorism related investigations. In 2001, the NSD was renamed the
Counterintelligence Division and three other units were branched off, the Security Division,
Cyber Division and the Office of Intelligence (later the
Directorate of Intelligence). ==See also==