As far as factions, if you look at the images, you will see who's going to be in it.
But for a list UK,Germany,France,Canada, been doing extensive research on every country viewed and based on what is available, so you would see armor or helmets being reused but retextured on different nations. Looking for the author to get permission for the armors and helmets used(from modern pack). But if you see stuff like it comes from cold war it wont be in this, you will need that mod. This may be a let down or not but to express this in important detail THIS IS NOT A COMPLIATION MOD.
And for the nations you see in image based on google reference
Latvia,Poland,Italy,Australia,Sweden,Russia,Japan,USA,China,Afghanistan,UK,Germany,France,Canada
Others that aren't present in images but in it Malaysia,Estonia,Finland
This has been in the work for some time on mowas, that is why you see new images fast, but the current images get updated also. so no plans to switch over to mowas2 since it is a newer engine and cold war isn't on mowas2. On another note, I don't know how to port vehicles.