In international law a political entity needs to fulfill different criteria to become an independent state: One of these criteria is that other states must recognize it as a state. If more states recognize it, becoming a de jure sovereign state will be easier.
Many of the territories listed below broke off (separated themselves) from their original parent state, and so they are often referred to as "break-away" states, that are de facto independent and are not recognized by other states or are only recognized by few states. They may have some military protection and informal diplomatic representation abroad. Another state may help them avoid forced reincorporation into its original state.
United Nations member states that are not recognized by all the other UN members are not listed here. (For example, 39 countries do not recognize Israel.)
Created by the Republic of South Africa from its own territory
These regimes had control over the territory of a country for which most other states recognized a different government as being the legitimate government: