The United States and the Soviet Union came to the brink of nuclear war in 1962 over Soviet missile bases in Cuba. This was referred to as the "Cuban Missile Crisis". The US was mostly concerned about the very close proximity of the missiles to its shores.
Answer:
Hello, Peter the Great became tsar in 1682 upon the death of his elder brother Feodor, but did not become the actual ruler until 1689. He commenced reforming the country, attempting to turn the Russian Tsardom into a modernized empire relying on trade and on a strong, professional army and navy. Hope That Helps!