State union of Serbia and Montenegro or simply Serbia and montenegro. In 2006. they separated thus creating two states: Serbia and Montenegro.

Serbia and Montenegro were formed when the Czech Republic was split.

There is no place called Serbia & Montenegro. Between 1998 and 2006 there was a country called Serbia & Montenegro but since 2006, when Montenegro declared independence, they have been 2 separate countries - Serbia and Montenegro. Postal codes depend on which city you are posting to.

Montenegro declared independance from serbia on 3. june 2006.

The status of the union between Montenegro and Serbia was decided by the referendum on Montenegrin independence on May 21, 2006. On June 3, 2006, the Parliament of Montenegro declared the independence of Montenegro, formally confirming the result of the referendum on independence.