Korea was a 'police action' and every subsequent American war was by Congressional Authorization; no one disputes that declarations of war were circumvented. Doesn't mean those who served were tainted by the amorality and incompetence of those who sent them to fight.
Really think most 18-20 year olds are political sciencey enough to say 'hey, no declaration of war; I ain't going?'
brooklyn13, Vietnam was an "undeclared war", you know it so your asking for that link was an asshole play. And i'll bet you didn't protest GWB going to war against Iraq either.