What Country Doe's Each Vehicle In Gem Ecditor Represent.

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Can anyone point me in the right direction of where to find what cannons, tanks ect, that each ciuntry used, like when am in the gem editor, well I don't want to keep using the same vehicles, I have been looking online for such a list, but am having trouble finding one, like exactly what I see in the vehicles category in the gem editor, well what country doe's each vehicle represent?

I hope that makes sense.

Thanks