the Aztecs did use horses in many unusally ways. But it took them a while to be informed of the creatures, so they weren't the first.
The Aztecs traveled by walking or by horses.
horses were large and powerful and the aztecs were terrified of them
None at first; horses are not native to the Americas. Perhaps they gained one or two that escaped the conquistadors, but it is hard to know.
weapons and horses
Probably not. There were no horses in the Americas until the Spanish came. I can never remember if the Aztecs were around then, or if it was the Incas or Maya, but after the horses showed up, there's no reason they couldn't eat them.
Horses and Smallpox.
The Aztecs used walking and had an advanced road system. Prior to the Spanish invasion of their empire, the Aztecs had no horses or wheels to assist their transportation.
The Aztecs did not have horses prior to the arrival of the Spanish conquistadors, so they did not have a tradition of breeding or using them for transportation or warfare. When the Spanish introduced horses to the Aztecs, there would not have been a significant difference in speed between Aztec horses and Spanish horses.
Considering this actually did happen, and since the Spanish wiped out the Aztecs, Spanish. Also Gunpowder and Horses
The Spanish had horses and guns while the Aztecs still used swards and did not use domesticated animals, but the reason they were able to defeat the Aztec was because the Aztecs suffered many deaths from disease.
horses