What are two methods used by the Spanish to invade and conquer the Americans

Military technology and native immunity.

Explanation:

Europeans easily conquered the native tribes of America. Military campaigns led to Spanish methods of staying in the New World. The Europeans were superior in that sense. They possessed technology that was not taught to the natives, so they easily defeated the Indian tribes. It is important to note that the natives did not have developed immunity to many diseases, such as smallpox. There is some evidence suggesting that Europeans and Spaniards deliberately infected the natives on several occasions, and the consequences were catastrophic. Infectious diseases decimated the natives.

answer: (fluidity)is the correct answer.

explanation: because of this characteristic, success on the battlefield depends in large part on the ability to adapt to proactively change events to our advantage as well as to react quickly to constantly changing conditions