<P> Papalotl (lit . butterfly) were warriors who had taken three captives; this rank wore "butterfly" like banners on their backs . </P> <P> Main articles: Eagle warrior and Jaguar warrior </P> <P> Aztec warriors were called a cuāuhocēlōtl (kwaːwo'seːloːt͡ɬ). The word cuāuhocēlōtl derives from the Eagle warrior cuāuhtli (kwaːwt͡ɬi) and the Jaguar Warrior ocēlōtl (o'seːloːt͡ɬ). Those Aztec warriors who demonstrated the most bravery and who fought well became either jaguar or eagle warriors . Of all of the Aztec warriors, they were the most feared . Both the jaguar and eagle Aztec warriors wore distinguishing helmets and uniforms . The jaguars were identifiable by the jaguar skins they wore over their entire body, with only their faces showing from within the jaguar head . The eagle Aztec warriors, on the other hand, wore feathered helmets including an open beak . </P> <P> The Otomies (Otōntin) (oˈtoːntin)) were another warrior society who took their name from the Otomi people who were renowned for their fierce fighting . In the historical sources, it is often difficult to discern whether the word otomitl "Otomi" refers to members of the Aztec warrior society or members of the ethnic group who also often joined the Aztec armies as mercenaries or allies . A celebrated member of this warrior sect was Tzilacatzin . </P>

What type of military system did the aztecs have