Which confrontation had the most lasting significance?

The confrontation had the most lasting significance was: students may choose Cuba because of proximity to the US and duration
Compared to United States, the taking education in Cuba will be a lot less cheaper and it also took less time.
For example, in Cuba average med-school cost is only around $20,000 and it took only approximately around 5 years, meanwhile in united states, the cost is around $180,000 and it took more than 7 years

answer: to communicate with people on the other side.

explanation:

but its not smart to do because the gateway on an ouija board is not gaurded