What is nationalism? How did this cause contribute to the start of World War I?

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Explanation:

The nationalist movement that had the biggest impact was the outbreak of war by Slavic groups in the Balkans. ... It was this intensified form of nationalism that led to the start of World War I through the assassination of Archduke Franz Ferdinand in Sarajevo in June 1914.The most direct way nationalism caused World War I was through the assassination of Archduke Franz Ferdinand, who was the heir to the throne of the Austro-Hungarian Empire. Many oppressed Slavic groups in the Austro-Hungarian Empire wanted to form independent nation states. ... Soon enough, World War I broke out.

frederick the great and the war of austrian succession. frederick william of brandenburg-prussia trained his son, frederick, to be a hardy soldier. he also declared himself king of bohemia, and maria theresa sent troops to retake bohemia. in august he led 80,000 of these men across the frontier into bohemia, his