Which events sparked World War I? Check all that apply. The assassination of Archduke Franz Ferdinand angered Austria. Serbia de
clared war on Austria, which caused Austria’s allies to go to war. Nationalism increased tensions in the Balkan peninsula. Russia's mobilization plan called for an invasion of France through Belgium. Alliances caused a chain of events that pulled each country into war.
These are the events that sparked the World War I: The assassination of Archduke Franz Ferdinand angered Austria. The nationalism of Serbia increased tensions in the Balkan peninsula. Alliances caused a chain of events that pulled each country into war.
