New evidence points to a clash between two ancient Mesoamerican cultures, Teotihuacan and the Maya.

[abqtommy]

1. As I read the op I wondered where the Aztecs were during this time around

378 C.E. or A.D. and the short answer is that the Aztec were relative latecomers. The
Aztecs came into power as a group around 1,300 C.E. or A.D., long after Teotihuacan
was abandoned but while the Teotihuacan-influenced Mayan Empire still existed.

I've probably searched this out before but here's a few links:

http://www.aztec-history.com/teotihuacan.html

https://www.linkedin.com/pulse/mayan-aztec-empires-dr-patrick-j-treacy

note: At the second link the Aztec information is a long scroll down. And of course we
people with an interest in these topics are seldom causing trouble elsewhere!