According to Bernal Diaz del Castillo's report how did Cortes's soldiers react to their first sight of Tenochtitlan

When the Spanish forces reached Tenochtitlan, they captured it and leveled the city.

Explanation:

The Spanish forces which were headed by Hernan Cortes, reached Tenochtitlan which was the capital of the Aztec empire. When they reached there, they captured that city and leveled the city.

After capturing that city, Cotes men captured Cuauhtemoc who was the emperor of Aztec empire. This made the empire totally come in their control by capturing the emperor.