War had decimated the country’s infrastructure and economy, and reconstruction proceeded slowly. Vietnam was unified as the Socialist Republic of Vietnam, though violence continued over the next 15 years, including conflicts with neighboring China and Cambodia. Under a broad free market policy put in place in 1986, the economy began to improve, boosted by oil export revenues and an influx of foreign capital. Trade and diplomatic relations between Vietnam and the U.S. were resumed in the 1990's.
This war had cost billions of dollars in damage and military costs, millions of lives were lost and even today, Vietnam remains a communist nation...
When revolutionist Fidel Castro took control of Cuba as its dictator, he cut off ties with the US as an agricultural and business conducting playground, seeking something greater for his country. Seeking aid for economic recovery, Castro sought the help of the US who refused.
In a plan known as the Bay of Pigs, Kennedy and administration sent in Cuban exiles trained by the CIA and attempted to overthrow Castro. The attempt was floundered and Castro was left in power.