Dude, don't bring that up to them. They will use it against you.
By the way Vietnam War was pretty out of date. I think the Gulf War was closer to the definiton of modern warfare.
Yeah I mean real experience of a large scale modern war.
Tell me what's the most recent "modern" war China or Japan fight ?
During Korean, China is proud of defeating USA ...
They bring that honor to fight Vietnam less than 3 decades later in 1979.
While Vietnam still far behind USA, they seem to be more modern tactical and effective usage of weapon than China,
in brief, Vietnam fighting style is more modern than China at that time ( for example communication by wire not words and more effective usage of formation, logistic )
Against Khmer Rouge ( trained and backed by Chinese ), Vietnam proved the best performance of modern tactical fighting ... by successfully wiped out Khmer Rouge within 1 week.
Vietnam War is the large scale and long war which inspire many directions for development of modern weapons for both Soviet Union and USA ... also the testing field for those ... like aircrafts, missile, air defense, tactical force, special force, artilery ..
We could say, we, Vietnam, Soviet Union, USA have learned a lot from that to enrich our experience for future war.
War to this side the dominance of weapon, high technology ; to other side by smart strategy, tactic, special force ..
or War to both side - the equality of weapons ...
The much bigger not always the winner but the smart strategy does
More refer to 6 days war of Israel to Arabs countries.