Charlie's Out on the Wire
Refighting Vietnam using DBA By Sgt. Pete
I've had these army lists sitting around on my desk for months, but you can blame the Dune lists for making me type this up! Originally these were for Hordes of the Things, but DBA is more recognised (although HOTT notes appear at the end). This one is going to run and run...
Jungle - Bad Going
Although 20mm is the usual for 'Nam, you could use 6mm and treat elements as whole squads (and you'd be able to field the tanks and Hueys easier).
Using Hordes of the Things (HOTT) Instead of DBA
If you are using HOTT the VC could have Sneakers and Lurkers instead of Psiloi.
Sneakers are Psiloi that fight like Blades, but can only kill Generals, Strongholds (Camps) or other Sneakers.
Lurkers are Psiloi that can be deployed mid-battle in contact with enemy troops in bad going (Jungle, villages etc).
The US could have Rambo as a Hero General, and the Hueys as Airboats.