The order in which the Cuban Missile Crisis started and then was escalated is:
After Castro took over Cuba, the Americans tried to dislodge him in the Bay of Pigs invasion. Castro wanted protection from further U.S. attacks and sought Soviet missiles.
When an American spy plane noticed these missiles, Kennedy issued an ultimatum to remove the missiles because Cuba was too close to American soil.
In conclusion, the order is 4,2,3, 1.
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