What was the primary motivation for the Soviet Union to deploy nuclear missiles to Cuba?

To protect Cuba from potential US aggression and to counteract the threat posed by US missiles in Italy and Turkey.

Explain the significance of Vasili Arkhipov's decision during the Cuban Missile Crisis.

Vasili Arkhipov prevented the launch of a nuclear torpedo from a Soviet submarine, potentially averting nuclear war.

I can analyze the causes and consequences of the Bay of Pigs invasion and the Cuban Missile Crisis.

1
The Cuban Missile Crisis brought the United States and Soviet Union to the brink of nuclear war during the Cold War, following the failed Bay of Pigs invasion.
2
To de-escalate the Cuban Missile Crisis, the U.S. agreed to remove missiles from Turkey and Italy and pledged not to invade Cuba, while the Soviets would withdraw missiles from Cuba under U.N. inspection.
3
During the Cuban Missile Crisis, Vasili Arkhipov prevented a nuclear launch from a Soviet submarine, and the U.S. military reached DEFCON 2, highlighting the grave risk of accidental nuclear war.