In the American Revolution, privateers transported arms, munitions and tropical products to the American continent. ... Following the American Revolution, many former privateers became captains on merchant ships, because without war, privateering was no longer needed on such a large scale.
Yellow Journalism. The Press over exaggerated a lot of news and blamed Spain for sinking an US ship. That started the Spanish American War.
The Shah's government was known for its autocracy, his one man rule where political corruption and political persecution were enforced by the Iranian secret police known as the Savak. Ayatollah Khomeini accused the Shah of Westernization, violation of the Iranian constitution and for paving a path towards the destruction of Islam in Iran.
D. South Korea surrendered after communist China's army joined the conflict.