Do you have a source for this statement that OIF is only propoganda and is not the actual name of the operation?  If so I would be interested to know what the name of the operation actually is.  As to your other questions, the Vietnam war comprised several operations occuring at the same time and did not fall under a single operational heading.  The Persian Gulf war was known as Operation Desert Shield and Operation Desert Storm.  It can hardly be argued though that reporters referring to the operational title of a military exercise is an act of propoganda, no more than referring to the Great Berring Reef is an implication that all other reefs suck; its the technical name.