"The enemy advances, we retreat; the enemy camps, we harass; the enemy tires, we attack; the enemy retreats, we pursue."
A long protracted resistance to new "ideas",is best accomplished by small bands who strike and disappear,hiding in plain sight. The VC would fight all night and be there waiting innocently in the ville's the next morning, bumming smokes from the GI's and slapping them on the back. It made for maddening confusion for the US, who planned conventionally. How does a conventional force react to unpredictable,unconventional,low intensity guerrila antics? Every American knows the answer.
Disruptions of communications and infrastructure,harassment, sabotage,ambushes,setting up parallel governments...all tools of the VC.
Other tactics include subversion, proselytizing, and propaganda to encourage desertion, defection and lowered morale among enemy troops. Remember these are brothers fighting brothers.
Surely Americans haven't forgotten the hard learned lessons of "the Vietnam Conflict"?