[1][2] According to Bernal Díaz del Castillo, Chichimecatecuhtli and Xicotencatl the Younger commanded the 50,000 Tlaxcaltec warriors who stopped the Spaniards and their Totonac allies before arriving to Tlaxcala in September 1519, believing them to be vassals to the Aztec Empire.
[5][6] The second day of the battle, due to their little success against the Spanish army despite their immense numbers advantage, Xicotencatl the Younger and a captain son to Chichimecatecuhtli accused each other of incompetence, causing a loss of authority for the former and the withdrawal in protest of the latter.
[8] Inner turmoil burst when Xicotencatl the Younger called for wiping out the remaining Spaniards in exchange for peace with the new Aztec emperor Cuitlahuac, an idea plainly rejected by his father and the rest of the lords.
[9] After Maxixcatzin's death and the solidifcation of the Hispano-Tlaxcaltec counterattack against the Aztecs, Chichimecatecuhtli was appointed supreme general of Tlaxcala and joined Cortés with 10,000 warriors to conquer Tetzcoco, which would use as a naval base in the eponymous lake.
[15] After the total victory over Tenochtitlan, Chichimecatecuhtli and the rest of native captain returned to their lands with large amounts of cured human meat from their Aztec enemies to eat in their feasts.