HIST 410N Final Exam Week 8 (TCO 6) The 1914 assassination of the heir to the Austro-Hungarian throne was a factor in causing World War I. What else might be considered factors? (TCO 6) The United States entered World War I because it (TCO 5) Nicholas II of Russia abdicated the throne following (TCO 5) What event marked the beginning of World War II? (TCO 9) The Cold War got hot, or flared up into actual fighting, in (TCO 9) During the Cuban Missile Crisis, the United States and the Soviet Unio...