Yes, what would I do if I couldn't steal from you ?
I will probably grab your great seal shield (did you grab the Captain America one form me or did you create your own version ?), no idea what else will be in your next version.
I'm not sure who did exactly what, but I do know my sources...
For my America units...
The models themselves of all units (except the Heavy Medieval Footman) are from v1.0 of Zerver's American Medieval Units... I never upgraded to the v2.0 Zerver Medieval American units because I didn't like what he did with them. v1.0 had a lighter-blue tunic with some variations to the texture... v2.0 had a much darker blue tunic that looked like he just used the paint-bucket to color the whole thing one monotone color. There's no variation or textured look to the uniforms at all in v2.0, it just looks like one shade of a very dark blue. Zerver does that with an alarmingly large number of his unit packs and I don't like it when he does that. v1.0 didn't do that, and I just liked the lighter blue anways...
Also, he changed a lot of the base models between v1.0 and v2.0... once again, I didn't like most of those changes to the models as I thought the original v1.0 models were just better choices... for some reason he seemed to reverse a lot of who was and wasn't carrying shields... like in v1.0 the Spearman was carrying a shield and the Pikeman wasn't... in v2.0 he reversed it so the Spearman was without a shield and the Pikeman had one. To me, v1.0 is more like how I envision it should be (and the default units in Civ4 are like that too)... there's more examples, but for the most part I just thought Zerver had it right in v1.0 over v2.0 and that's why I never upgraded.
However...
I was never overly-fond of the v1.0 shields myself either... and I remembered that Zerver improved the shields in v2.0... so I went looking for v2.0 to take a look at the shields... but, it would seem the main download for Zervers American Medieval units is down (hacker I suppose that never got re-uploaded), but I figured one of you bums probably had v2.0 in your packs, so yes, I checked your Diversica mod for Zerver's v2.0 units and found them there... I did initially borrow the striped/stared shield from there assuming it was Zerver's v2.0 shield... was that your creation? In any case, I decided to go with a different approach and eventually settled on the new Great Seal of the United States that can be seen in my Wolfshanze Mod thread. I also "lifted" the heavy footman from v2.0 as it was the only base model I preferred over the v1.0 models... but I've already modified him by bringing his tunic back-in-line with the v1.0 models (a lighter-blue/textured look) and I just modified him to carry a mace instead of sword.
Hence, I call it Zerver's American Medieval Units v3.0.
Oh... as for my next version (whenever I release it... it's nowhere near ready), I have about 16 other new/modified models/skins in addition to the new American Medieval set. I'm still searching/looking/digging/waiting for new models.