The immediate result of the Vietnam War was that the communists won and Vietnam was united as one country, run by the communists. In Vietnam, this led to a number of things. Notably, it led to the flight of over 1 million Vietnamese who wanted to escape the country.
It could be argued that the "serf" was the "property" of the land during the Middle Ages, since under the feudal system that reigned supreme during this time, serfs (or peasants) had very little rights of their own.
This shows that they were very clever to make a stone wall. This makes trying to bring down the wall harder most likely make enemy think not to attack them.
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