Answer:
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. ... Thus, nationalist movements broke out across the Slavic territories. Among the most militant nationalists were the Serbs.
They wanted to expand their empires and nations by acquiring more land. They wanted to kidnap the Natives and force them into slavery.... yeet
No espanol holmes but my ppls gone getchu right