On May 29, 1453, after an Ottoman army stormed Constantinople, Mehmed triumphantly entered the Hagia Sophia, which would become the city's leading mosque. Emperor Constantine XI died in battle that day, and the decline and fall of the Byzantine Empire was complete.
While there were many other factors, threats and violence definitely were key aspects to Hitler's rise to power. His use of terror tactics made people obedient through fear. After acting upon his threats, they knew if they didn't follow him, there was a good chance they would die. He used a sort of manipulation that while brutal, tends to be effective, as portrayed through many events and leaders in history, such as the French Revolution, Mao Zedong (China), Stalin (Russia), and Leopold II (Congo).
Out of the choices given here, the majority of the the American intervention in foreign affairs occurred during the Cold War. The Cold War began in 1947 and finally ended in 1991.