* Nationalism in Germany led to the unification of the country in 1871.
* The government of Otto von Bismarck used nationalism to rally the German people and to justify its aggressive foreign policy.
* Nationalism also played a role in the outbreak of World War I.
Austria-Hungary:
* Nationalism in Austria-Hungary led to the empire's collapse in 1918.
* The empire was a multi-ethnic state, and nationalism led to conflicts between the different ethnic groups.
* The government of Austria-Hungary was unable to suppress these conflicts, and the empire eventually fell apart.
In summary, nationalism had a different impact on Germany and Austria-Hungary. In Germany, nationalism led to unification, while in Austria-Hungary, it led to collapse.