Which major world conflict was influenced by nationalism?

Nationalism played a significant role in the outbreak of World War I. In the early 20th century, many nations were experiencing a strong sense of national identity, which fostered a desire for independence and self-determination among various ethnic groups. This intense nationalism contributed to the competition and rivalries among European powers, particularly as countries aimed to assert their dominance and power.

The assassination of Archduke Franz Ferdinand of Austria-Hungary in 1914, by a nationalist who sought to promote Serbian independence, was a direct trigger for World War I. This act highlighted the underlying tensions fueled by nationalist sentiments that existed in the Balkans and across Europe. The war quickly escalated, drawing in multiple countries as alliances were formed based on national interests and mutual defense agreements, further showcasing how nationalism shaped the conflict on a grand scale.

This context demonstrates how deeply intertwined nationalism was with the causes of World War I, making it a central factor in the lead-up to and execution of the war.