[quote=@Foster]
<Snip where Foster nerds about tanks>
[/quote]

I wouldn't worry exactly how many they have; it's not really important to the plot, and I'm not going to be counting off each one meticulously. They have 'as many as the plot requires' to make it interesting and exciting, rather than adherence to realism to that degree. I do like the frankenstined AFV's though, that's very in keeping with the setting, and especially makes sense with the ISL becoming a thing too, giving them a bit more of an identity. 
I'm mostly envisioning us facing off against older soviet-era models at the moment, and the more advanced/modern stuff becoming an issue as we start to hit more key and vital areas down the line, once we advance both in geography and plot.