When Did the Aztecs Use the Macuahuitl?

The available records show that the Aztecs used the weapon mostly when they were fighting against the Spaniards. It’s clear that they were also used in battle against other Mesoamerican tribes/nations. Unfortunately, very few Pre-Hispanic records survive.

As it states here, most of the information we have about when the Aztecs used the macuahuitl is based partly on legend, so definitive answers to this question are also speculative at best.