Germany
Austria Hungary did not become one nation after World War 1.
The kaiser's support of Austria-Hungary led that nation to declare war on Serbia-novanet
the nation that Austria-Hungary thought responsible for the assassination was Serbiathe nation that Austria-Hungary thought responsible for the assassination was Serbiauniting bosnia with Serbia
The country is Austria.
Austria-Hungary
Yugoslavia
Austria
Germany was the biggest central power in WW1 but the Otoman Empiere also was in it with Austria Hungary.
Yugoslavia.
Czechoslovakia.
Germany and austria were never ONE nation, but austria was a part of austria-Hungary. austria might have been part of the German empire way back in the middle ages.