 Together with the "tlacateccatl" (general), he was in charge of the Aztec army and undertook all military decisions and planning once the "tlatoani" had decided to undertake a campaign.The "tlacochcalcatl" was also in charge of the "tlacochcalco.Tlacochcalco" ("in the house of darts") was the name of four armories placed at the four entries to the ceremonial precinct of the Aztec capital Tenochtitlan.