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