Re: Cuban Missile Crises
What has your research taught you? What are your opinions about it? What was a key cause? What was the key to diffusing it? What effect did it have on relations between the countries in the next decades?
Form one strong opinion and state it, and then spend the rest of the essay defending that opinion with the facts you have learned.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.