Under the tripartite treaty made by the kingdoms of Mexico, Tezcuco, and Tlacopan, a military council was established consisting of a president and twenty-one members. During the reign of the emperor Nezahualcoyotl their deliberations were held in a hall of his palace in Tezcuco. The president belonged to the highest rank of the nobility and commanders of the army, the other members were composed of six of the principal men of Tezcuco, three nobles and three commoners, and fifteen selected from the other chief provinces. All were veteran officers of recognized courage and good conduct. To this court were referred all matters relating to war. The council assembled when required, to discuss and decide all affairs of the service, whether for the punishment of offenses subversive of military discipline, or to transact the business relative to a declaration of war against other powers. In the latter case the consultation always took place in presence of the sovereign, or of the three heads of the empire. All ambassadors and soldiers were subject to this tribunal, which meted out reward as well as punishment. The following were the articles of war:
ARTICLES OF WAR.
First: any general or other military officer who, accompanying the king on a campaign, should forsake him, or leave him in the power of the enemy, thereby failing in his duty, which was to bring back his sovereign dead or alive, suffered death by decapitation.
Second: any officer who formed the prince's guard and deserted his trust, suffered death by decapitation.
Third: any soldier who disobeyed his superior officer, or abandoned his post, or turned his back upon the enemy, or showed them favor, suffered death by decapitation.
Fourth: any officer or soldier who usurped the captive or spoil of another, or who ceded to another the prisoner he himself had taken, suffered death by hanging.
Fifth: any soldier who in war caused injury to the enemy without permission of his officer, or who attacked before the signal was given, or who abandoned the standard or headquarters, or broke or violated any order issued by his captain, suffered death by decapitation.
Sixth: the traitor who revealed to the enemy the secrets of the army or orders communicated for the success thereof, suffered death by being torn to pieces; his property was forfeited to the crown and all his children and relations were made slaves in perpetuity.
Seventh: any person who protected or concealed an enemy in time of war, whether noble or plebeian, suffered death by being torn to pieces in the middle of the public square, and his limbs were given to the populace to be treated as objects of derision and contempt.
Eighth: any noble or person of distinction who, in action, or at any dance or festival, exhibited the insignia or badges of the kings of Mexico, Tezcuco, or Tlacopan, suffered death and forfeiture of property.