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) War of the Celtic Restoration (1937) (results in an independent Bretagne and Ireland) Danube Unrest (1950-1952) Baltic War (1954-1955)