Conquistador Hernan Cortes and his Spanish troops did not conquer the Aztec Empire on their own. They had allies, with the Tlaxcalans being among the most important. As conquistador Hernan Cortes was making his way inland from the coast on his audacious conquest of the Mexica (Aztec) Empire, he had to pass through the lands of the fiercely independent Tlaxcalans, who were the mortal enemies of the Mexica. At first, the Tlaxcalans fought the conquistadors viciously, but after repeated defeats, they decided to make peace with the Spanish and ally with them against their traditional enemies. The aid provided by the Tlaxcalans would eventually prove crucial for Cortes in his campaign.