Short Answer 
The answer outlines the events leading to the Cuban Missile Crisis, starting with the U.S. attempt to oust Castro following Cuba’s takeover. It details the discovery of Soviet missile sites in Cuba, which escalated tensions, and concludes with President Kennedy’s ultimatum that led to a negotiated resolution where the Soviets dismantled the missiles in exchange for U.S. concessions.
Step 1: Background of the Conflict
After the successful takeover of Cuba by Fidel Castro, the United States aimed to remove his regime, leading to the disastrous Bay of Pigs invasion in 1961. This event strengthened Castro’s resolve and motivated him to seek military protection. In response, he sought Soviet missiles to deter future U.S. interventions.
Step 2: Discovery of Missile Sites
In October 1962, an American surveillance plane discovered missile launching sites being constructed in Cuba. This shocking revelation indicated that the Soviet Union was deploying missiles just 90 miles from American shores, drastically escalating tensions. The U.S. government realized the immediate threat posed by these installations.
Step 3: Kennedy’s Ultimatum and Resolution
In reaction to the intelligence reports, President John F. Kennedy issued an ultimatum demanding the removal of these missiles. The crisis reached its peak as both nations stood on the brink of war. Eventually, through a series of negotiations, the Soviets agreed to dismantle their missile sites in exchange for a U.S. promise not to invade Cuba and the removal of American missiles in Turkey.