Good practices:
Speaking clearly
Standing straight and tall
Controlling your pacing
Speaking with the same volume
Moving your hand often to keep attention
Bad practices:
Looking at your notes the entire time
Answer: to inform readers about the tactics Sparta and Rome used to hold cities and their effectiveness
Explanation:
The secondary purpose of Machiavelli in writing this passage is to inform readers about the tactics Sparta and Rome used to hold cities and their effectiveness.
The text evidences which support this include the list of the cities that were ronquered by Sparta and Rome, explanation with regards to how Greek cities were dismantled by Rome and the description of how Greece was held by Sparta.