I just got curb stomped by the aztecs I had 0 iron, they had 5 or 6, and they wound up with that new natural wonder (gold city) that gives +500...coupled with honor, rush bought lots of cheap units (spearmen)+built 2 catapults and ran over me in the classical era. With the horse nerfs my horse died attacking a damn catapult; I'm not sure how that happened.