- Second Franco-German War (1914)
War between the German Empire and Austria-Hungary on the one side and France, Great Britain and Belgium on the other. Ended with the Peace of Milan.
- Russo-German War (1914-1915)
War between the German Empire and Austria-Hungary on the one side and the Russian Empire and Serbia on the other. Ended with the Peace of Riga.
- Mediterranean War (1933-1936)
(resulted in an independent Catalonia, Basque Country, Lanquedoc, Slavonia and an enlarged Italy and Greece)
(results in an independent Bretagne and Ireland)
- Danube Unrest (1950-1952)
(results in the splitting of Austria-Hungary and the separation of Bavaria, Saxony and Lorraine-Luxembourg from the German Empire and the peacefull loss of East-Frisia and parts of the Ruhr-area to the Netherlands and Holstein to Denmark)
- Baltic War (1954-1955)
(results in unification of Norway, Sweden, Finland, Denmark, Iceland and Estonia)