Vehicles are looking great. Nice work love your work...

I only have two comments; firstly, great diorama! Secondly, the helmets for the crew of the armoured vehicles have two cords which come out of the back and are connected to a small box which allows them to either talk to each other, or transmit on a set frequency. This means it's quite unlikely that the armoured vehicle crew would dismount with their helmets on, mostly because of the inconvenience of the helmet and the cords which are connected to it. Usually they left them on the vehicle and put them back on when they came back.

Other than that, great concept, good overall look

Just have to take the guy sitting on top of the engine off the M113. That's where the exhaust was and nobody wanted to be near there or the engine. The further back you are the cooler the temperature.