United Nations

The United Nations (UN for short) functioned as a coalition of Earth nations which also created international campaigns and programs The UN co-ordinated many of these efforts from Geneva in Switzerland.

In the late 20th century, the UN put together the United Nations Intelligence Taskforce (later the Unified Intelligence Taskforce) in order to defend the Earth against threats such as the Great Intelligence (DW: The Invasion et al).

Behind the Scenes
The Real World United Nations disapproved of the link between the UN and the fictional UNIT. Thus UNIT became known as the Unified Intelligence Taskforce.