Global silver trade from the 16th to 18th centuries which China desired, so they traded silver to make up for their trade deficit. The two most important mining colonies of the Spanish Empire were Peru and Mexico, who were estimated to have provided one-hundred thousand tons of silver from the mid 16th Century to the end of the colonial period. The richest, and most productive mine in the Americas was that of Potosí in what is modern day Bolivia. The richest camp in Mexico was in the city of Zacatecas, however the production of this mine was far less than that of Potosi. More simplistic native mining techniques dominated
Aztec warfare of payment received from the parents. Thus, sons of high nobility tended to succeed more often in war than those of lower nobility. Broadly, Aztec army ranks were similar to the modern Western rankings of “General” and "Major”, as were the groupings of warriors into categories such as “enlisted men” or “officers”. However, while parallels can be drawn between the organization of Aztec and Western military systems, as each developed from similar functional necessities, the differences between the two are far greater than the similarities. The members of the Aztec army had loyalties to many different people and institutions, and