- Provided Cortés with thousands of soldiers and native women.
- Allowed the Spanish to establish a staging ground for their advance on Tenochtitlan.
- Gave the Spanish their first exposure to the Aztec Empire and its culture.
Tlaxcalans:
- Provided Cortés with an alliance that was crucial to the Spanish victory over the Aztecs.
- Supplied the Spanish with food, shelter, and transportation.
- Aided the Spanish in their military campaigns against the Aztecs.
- Became valuable allies to the Spanish during their conquest of Mexico.