Complex sentence: In the colonial period Otomi speakers helped the Spanish conquistadors as mercenaries and allies, which allowed them to extend into territories that had previously been inhabited by semi-nomadic Chichimecs, for example Querétaro and Guanajuato.
Split into simpler sentences: In the colonial period Otomi speakers helped the Spanish conquistadors as mercenaries and allies,. As a result, which allowed them to extend into territories that had previously been inhabited by semi-nomadic Chichimecs, for example Querétaro and Guanajuato.