Read the CIA brief regarding the Cuban Missile Crisis. Why did Soviet ships turn back on their way to Cuba?

US ships had formed a naval quarantine around Cuba.
The Soviet Union had sworn not to interfere in Cuba.
Fidel Castro had proclaimed that the ships could not dock in Cuba.
The United Nations had issued a medical quarantine of Cuba.

US ships had formed a naval quarantine around Cuba.

Explanation:

The US formed a blockade to prevent the Soviets from assisting Cuba.

north atlantic treaty organization.

the alfred thayer mahan award for literary achievement is awarded each year by the navy league of the united states. the award is named for an american naval historian and theorist, rear admiral alfred thayer mahan, united states navy who, through his writing, provided stimulus and guidance to those who share in the defense of the nation. presented since 1957, "this award for literary achievement is awarded to a u.s. navy officer, u.s. marine corps officer, enlisted service member, or civilian who has made a notable literary contribution that has advanced the knowledge of the importance of sea power in the united states."[1]