[Answer] 5. The Archduke of Austria ______________________ was assassinated on June 28, 1914. This was the "spark" that started the war.

Step 1 : Introduction to the question "5. The Archduke of Austria ______________________ was assassinated on June 28, 1914. This was the "spark" that started the war."

...1. Samuel Lemar 2. Sergei Hunera 3. Franz Ferdinand 4. Adolf Hitler It was on June 28, 1914, in the town of Sarajevo. The three Black Hand assassins at Savajevo were all teenagers suffering from tuberculosis.