Jaguar warriors (Ocelotl in Nahuatl) formed an elite military class within Aztec society and were formidable enemies as attested to by Spanish forces in the 16th century. Warriors who were accepted in to this class had many of the same privileges as nobles.
They were expected to be at the forefront of any battle and believed that their association with the jaguar would give them its power and ferocity.
To become a Jaguar Warrior individuals had to excel at their profession and capture 12 enemies over two consecutive battles. These enemies would later be sacrificed which Aztec society believed appeased and pleased their Gods.