Germany v. France (1914)
Germany v. Russia (1914)
Austria-Hungary v. Serbia (1914)
World War I
Austria-Hungary v. Serbia (1914)Germany v. Russia (1914)Germany v. France (1914)Britain v. Germany (1914)Montenegro v. Austria-Hungary (1914)Japan v. Germany (1914)Ottoman Empire v. Russia (1914)Italy v. Austria-Hungary (1915)Portugal v. Germany (1916)Rumania v. Austria-Hungary (1916)Britain v. Greece (1917)United States v. Germany (1917)China v. Germany (1917)