Final answer:
Machiavelli's secondary purpose is to persuade readers that a conquering prince must destroy a former republic if he hopes to hold it.
Step-by-step explanation:
Machiavelli's secondary purpose in writing this passage is to persuade readers that a conquering prince must destroy a former republic if he hopes to hold it. He argues that if a conqueror does not destroy a city accustomed to freedom, it will eventually rebel against them, as it holds onto its watchword of liberty and ancient privileges. This passage serves as a warning to rulers about the potential dangers of conquering and governing a city with a republican history.