All aircraft,jeeps,trucks apc's,figuers and helos would be included in the campaign. there are two classes, Americans, South Korean, Australian and the other class is N.V.A/VietCong.
The Rules and Regs
1. don't start on your projects until the start of campaign.
2. the aircraft can be from any era but you have to make it look like it was used in nam.(ie. a corsair painted in a southeast asian camo scheme with napalm tanks.)