As far as the figures go it's a bit of a box ticker for Silvercorn really, other people have Blogged/posted them so the best thing to do is go and look at PSR's post, but a couple of points arise, so to get them on the Blog . . .
I believe (until some come to light!) that there is a cross-pollination of visual memory going on here; these sets came out around the same time as the Hornby Railways 'Battle Zone' model railway set, which contained similar (but ethylene) figures in both colours, those figures were also issued by Dollar Tree in the 'States and Toy Masters over here.
Additionally Smart Toys were issuing small PVC figures, again very similar (but painted), which (the Smart Toys) harked back to the Galoob Micro-Machines figures which also had green and tan issues (among other colours). I suspect the common trope of two colours have led people to 'imagine' a tan issue for these . . . but stand to be corrected!
To argue against myself, I have some clip-together 'micro-vehicles' around the 1:285 or 1:300 mark, which may well be from the Land Vehicles, Terrestrial War Games set. They do come in tan and green, but firstly, the bodies are one colour, the tiny wheels another, and secondly they are styrene like the vessels (below). I also have some darker green figures from this set, but no tan . . . yet?
There's also the small matter of the two brownish-grey road-signs, which seem incongruous as there are better sculpted ones on the accessory frames, but they were in my UK bought sets as well as Brian's US purchase, so must have been added for 'value'.
Returning to the 'unknown micro-AFV's' (which are in storage), they are of similar material and construction, hull and belly-pan clipping-together, trapping the wheel/axle mouldings in channels for free-rolling movement. I only have a small bag of them, but they consist of a 6x6 truck, various LAV/Piranha types (6x6 and 8x8 - I think?) with separate turrets and something like an Sd.Kfz.222 if I'm recalling them correctly, I don't remember having any tracked vehicles?
If they are what I think they are, then the fourth set (Air Machines, Aerial War Games) will probably prove to be an assortment of around a dozen modern combat types, probably in this neutral grey plastic, possibly as two halves or with plug-in wings?
I'll keep a look-out for them, and we can return to Silvercorn in a few years! Thanks to the Brian's U for dropping the ID into the blog and B for sending images and samples!
22 minutes ago