How many Spaniards actually reached Tenochtitlan in 1519?

In 1519, a small expedition led by Hernán Cortés reached Tenochtitlan, consisting of approximately 600 Spanish soldiers. This number included various allies, such as indigenous warriors who joined Cortés during his journey. While the exact count may vary slightly depending on different sources, the core group that entered Tenochtitlan was around this figure, marking the beginning of significant interactions between the Spanish and the Aztec Empire.