G4S has its origins in a guarding business founded in Copenhagen in 1901 by Marius Hogrefe originally known as Kjøbenhavn Frederiksberg Nattevagt (which translates as Copenhagen and Frederiksberg Night Watch) and subsequently renamed Falck.[5] In 2000 Group 4, a security firm formed in the 1960s, merged with Falck to form Group 4 Falck.[5] In 2002 Group 4 Falck went on to buy The Wackenhut Corporation in the USA.[6] In 2003 Group 4 Falck signed a Detention Services Contract with the Department of Immigration and Multicultural and Indigenous Affairs (Australia).[7] Under this contract Group 4 Falck took over direct control of Australia's refugee detention centres from Correctional Management, owned by its subsidiary Wackenhut, which had run them since 1998. In 2004 Group 4 Falck merged with Securicor, a security firm founded in 1935 in London, to form G4S