First; Vietnam was only considered to be a "conflict", wasn't upgraded to a war until much later...During the "conflict" american forces weren't ALLOWED to fight to win...Also keep in mind, the USA was the very last country to try thier hand at solving the issue, which was basically a civil war we had no business in...BTW, I was there at the end, during the fall of Saigon as an Airborn Ranger...Also Vietnam was the USA's first experience with "guarilla warfare", government didn't learn much or we would be able to do more against "terrorists"...