1. What three European countries signed an alliance called the Triple Entente? 2. What is it called when a country expands its influence and power into a large empire? 3. Which two countries had become wealthy through creating vast worldwide empires? 4. What single event triggered the start of World War I? 5. Who was Archduke Ferdinand? 6. What country declared war on Serbia at the very start of World War I? 7. Why do some historians believe that Germany wanted to start World War I? 8. Which side was the United States on at the start of the war? 9. What was a cause of the tension before World War I? 10. World War I was mostly fought between the countries of what continent? 11. What alliance was the enemy of the Allied Powers during World War I? 12. Name a country in the Allied Powers alliance. 13. In what country did the majority of the fighting along the western front occur? 14. What event forced Britain to enter the war on the side of the Allied Powers? 15. What event caused Russia to make peace with Germany and leave the Allied Powers? 16. What major nation entered the war on the side of the Allied Powers almost three years after the war began? 17. Who was the leader of Russia at the start of World War I? 18. Who was the prime minister of France during the latter part of World War I? 19. Who was the prime minister of Britain during World War I? 20. Who was president of the United States during World War I? 21. What alliance was the enemy of the Central Powers during World War I? 22. Which of the following countries was not a Central Power? 23. Which country invaded Serbia after the Archduke Ferdinand was assassinated? 24. What happened to the Ottoman Empire after World War I? 25. Who was Sultan of the Ottoman Empire during World War I? 26. Who was the Emperor of Germany during World War I? 27. Who was the leader of Bulgaria during World War I? 28. Who was the leader of Austria-Hungary during World War I? 29. Around how many soldiers did the Central Powers mobilize during the war? 30. What was another name for the Central Powers? .