@BillRM,
Have you read
True History of the Conquest of New Spain, by Bernal Díaz del Castillo, 1576? Obviously you haven't. Have you read
The History of the Conquest of Mexico, William Prescott, Boston, 1843? Obviously, you haven't. Cortés had a few more than 400 men when he landed in what we call Mexico. He was attacked by the Tlaxcalans for three days in a row, and Díaz says that by the end of that time, every man had been wounded. Cortés only survived by negotiating with the Tlaxcalans, and he then marched on Tenoctitlan with thousands of Tlaxcalans in his train. When he learned that Narvaez had landed on the coast with more than 1200 men, he marched there with his aborigincal allies, and they captured the force, almost all of whom signed on with Cortés. They marched back to Tenoctitlan, but were driven out after the death of Moctezuma. He came back with more than a thousand Spaniards, and thousands and thousands of aboriginal allies, from Texcoco, Cholula and other cities of the valley, along with his Tlaxcalan allies. Those people provided his logistical support. It still took them 22 months to take the city--they had to fight it out block by block in a city in a lake, with canals for streets.
Your 'knowledge of history" is like a mud puddle--small and shallow--and it dries up in the bright light of day.