Answer:
When talking about the Vietnam War, it is necessary to make a distinction between the military results and the social impact of the conflict. Thus, in 1973, when the Vietnam War came to an end with an American defeat, things were going relatively well for the United States in the military field. In other words, several victories had been obtained in specific battles, although the guerrilla war continued to cause several headaches for the American soldiers. Therefore, the war was ended rather by antiwar social pressure that saw the conflict as a meaningless conflict in which America had no genuine interest and in which the lives of young Americans had no reason to be risked. Therefore, if it had not given in to social pressure, most likely America would have ended up winning the war.
B. It was a center of trade on the Mediterranean
For more than 1000 years Constantinople was the capital of the Byzantine empire. It had an strategic position for trade, and many trading routes passed through there. It was the biggest and richest city in all of Europe.
Since Roman was expanding and it didn't have control of their lands and couldn't govern most of it. It kept expanding until the western part of Roman was conquered by Barbarians.
I don't have the proper answer and you might have to do research but America did gain much from the war such as Cuba, The Philipines, and Guam.
