Which of the four case studies (Italy, Germany, Dual Monarchy, Ottoman Empire) of nationalism was the most successful? Explain why.

Germany

Explanation:

Otto van Bismarck used nationalism to unite the German people and expand Prussia/Germany's military and land to become one of Europe's best militaries

what the first or next guy says

the right answer is the end of world war ii

after the end of a global wwii all the nations involved, in an attempt to create an organization to maintain world peace. this agreement would work settling international disputes via negotiation and arbitration instead of leading the issues escalate to another war.