To what extent is it fair to claim that America lost the war in Vietnam and how did the war impact on subsequent foreign policy?

Essay from the year 2014 in the subject Politics - International Politics - Region: USA, grade: 1,7, University of Kent (Department of International Relations), language: English, abstract: The following essay intends to illustrate, with the help of comparing revisionist and orthodox theory, the reasons for the failed war in Vietnam for the U.S. and whether it is fair to claim that the U.S. lost the war. Furthermore, I intend to show how the war had an impact on the subsequent foreign policy of the U.S.
These questions can be answered in several different ways, depending on which school of thought the field of international relation studies is used in particular are they differing in the perception whether the engagement in Indochina was necessary at all?