The Soviets were setting up nuclear missiles in Cuba. This meant that they were now able in theory to launch a nuclear missile directly at large parts of the USA and it was therefore viewed as a threat by the USA. I hope that helps.
Answer: the French and Indian war in 1763, relations between the American colonists and the British crown and parliament quickly deteriorated.
1.
Many new nations in Latin America struggled to create a government and a table economy.
2.
James Monroe supported the independence movements and warned European nations to stay away.
Yes, they did. Even though it was not as effective as modern procedures
