It would have been pretty primitive fighting. While I’m sure death did happen, it might not have been a certainty even for the fighters. If they had been living the the area stably for thousands of years, there’s a good chance they found an equilibrium regarding the cycle of violence.
Aztecs were a warrior culture but when they fought, they fought to capture rather than kill. It was so they could sacrifice the prisoners, but it is an example of conflict with serious consequences that didn’t involve much death on the battlefield, let alone for those who were likely not even combatants. It’s even possible the women willingly went along with whoever was stronger. Hell, let’s add another layer of complexity, it’s possible the women willingly went long with whoever was stronger specifically so that they would spare the lives of the ones they were leaving.
It’s really all speculation without any evidence, and even with evidence, it’s easy to misinterpret that evidence when viewing it through our perspective. Eg: ancient aliens.