Under reunification means the restoration of the unity of political and legal structures. It is to be distinguished from a simple union of structures that were not previously divided peacefully or forcibly.
Reunification stands for territorial (state unity) for:
- the reunification of Normandy (since 2016)
- the German reunification on 3 October 1990
- the Yemeni reunification of 1990, see History of Yemen #reunification
- the Vietnamese reunification of 1976, see Vietnam #Socialist Republic of Vietnam
- the reintegration of the Memelland in 1939, referred to as the reunification of the Memelland with the German Reich
- the annexation of Austria in 1938, and reunification of Austria with the German Reich called
- the reunification of Sønderjylland with Denmark in 1920, see referendum in Schleswig
- the Bulgarian reunification of 1885, see Serbian-Bulgarian War
- the Bavarian reunification of 1506, see History of Bavaria # Bavaria's beginnings as a territorial state
- The French King Louis XIV waged four wars from 1679 to 1697 as part of his reunion policy ; in the Peace of Rijswijk (1697) Alsace came to France.
Some reunions have been sought unsuccessfully for decades, including
- the reunification of the canton of Basel
- the Irish reunification
- the Korean reunification
- the Cypriot reunification , see Efforts to reunification and the accession to the EU
- on September 10, 1919 the Treaty of Saint-Germain with German Austria ,
- on November 27, 1919 the Treaty of Neuilly-sur-Seine with the Kingdom of Bulgaria ,
- on June 4, 1920 the Treaty of Trianon with Hungary and
- on August 10, 1920 the Treaty of Sèvres with the Ottoman Empire .
As a result of these treaties, numerous regions (e.g. the Reichsland Alsace-Lorraine ) returned to countries to which they had once belonged.
The reunification of musicians in a band is called a comeback or reunion.