What did Cortes do so his men could not retreat or go back to Spain?

According to HIstory.com

Faced with an Aztec revolt against their rule, forces under the Spanish conquistador Hernan Cortes fight their way out of Tenochtitlan at heavy cost. Known to the Spanish as La Noche Triste, or “the Night of Sadness,” many soldiers drowned in Lake Texcoco when the vessel carrying them and Aztec treasures hoarded by CortÝs sank. Montezuma II, the Aztec emperor who had become merely a subject of Cortes in the previous year, was also killed during the struggle; by the Aztecs or the Spanish, it is not known

explanation:

allergens: overstimulate the nerve system

neurotics: attack nerve cells

mutagens: damage or otherwise alter dna sequence

generators: cause defects during growth and development  

carcinogens: cause unchecked cell growth

i hope you get the idea according to me these are the effects that happened.

would it be plagiarism to copy and paste off of here? ?