I went to Tripples Last year and ended up with a bit of money left over and no idea what to get, and I ended up with these! They are American Vietnam stuff from Pendrakens 10mm Range and are great figures, I love most of Pendrakens stuff.
I based all the Nam stuff in 4's for the Infantry, and smaller bases for the HQ, Forward OB and Heavy Weapons. I put together 4 helicopters for them just made out of bits from my bits box and a bit of Green stuff, this was just to have something to play with before I got around to getting some proper models. Sadly this never came about.
To go with these figures I also tried out a bit of Brown-water navy, thinking this would be the next big thing, I made a Helicopter monitor and some monitors and Landing Craft. They were fun to make.