The Five Eyes (fvey) network is the official intelligence sharing agreement between the world's English-speaking world, the United States, Canada, the United Kingdom, Australia and New Zealand. Among them all, the world is divided up for electronic telecommunication traffic surveillance and monitoring. Each has intelligence sharing agreements with partners in their respective spheres, for example the United States works closely with Latin American nations in both human and electronic intelligence matters, as does the UK with European Union member states' intelligence agencies.
Project Echelon is the forerunner of the Five Eyes agreement. U.S. and the British Empire intelligence sharing pre-dates World War II, the National Securty Act of 1947, and the creation of the CIA and NSA. The UK and American close relationship is sometimes referred to as the "special relationship."