Tear gas would be what was not used by the Spanish against the Native Americans in battle.
This was due to the fact that they were fighting for territorial control. That is the fight was because they wanted to be able to take over the lands of the Native Americans while the natives were fighting to defend themselves and their ancestral homes.
Tear gas is the solution because it would not have been made at the time. This would be a later invention hence there is no way that it would be used in the fight
Read more on Native Americans here: https://brainly.com/question/24724492
#SPJ1