 These mains armories were stocked with new weapons every year (during the festival of Quecholli), and one account by the Spanish "conquistador" Andrés de Tapia estimates the number of weapons found in each of the four armories to be 500 cartloads") 

The "tlacochcalcatl" was always a member of the military order of the "cuachicqueh" "the shorn ones".The office of "tlacochcalcatl" was often the last step towards becoming the next "tlatoani.