text: When formal training in handling weapons began at age fifteen, youth would begin to accompany the seasoned warriors on campaigns so that they could become accustomed to military life and lose the fear of battle. At age twenty, those who wanted to become warriors officially went to war. The parents of the youth sought out veteran warriors, bringing them foods and gifts with the objective of securing a warrior to be the sponsor of their child. Ideally, the sponsor would watch over the youth and teach him how to take captives. However, the degree to which the warrior looked after and helped the noble's child depended greatly on the amount of payment received from the parents. Thus, sons of high nobility tended to succeed more often in war than those of lower nobility.
  Stratification and ranks
  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 ranking was not based solely on the position one held in a centralized military hierarchy. Thus, the classification of ranks and statuses cannot be defined in the same manner as that of the modern Western military.
  The commoners composed the bulk of the army; the lowest were porters (tlamemeh ) who carried weapons and supplies, next came the youths (identified by the top knot hairstyle they wore) of the telpochcalli led by their sergeants (the tēlpochyahqueh  "youth leaders"). Next were the commoners yaoquizqueh. And finally, there were commoners who had taken captives, the so-called tlamanih.  "captors".