Final answer:
One reason to join the Roman army was to gain the right to vote and improve social status. Another reason was the potential for career advancement, such as becoming a consul.
Step-by-step explanation:
One of the reasons an individual would join the Roman army is to become part of the military, which would grant aristocratic males and poor farmers the ability to vote in Rome. This was a way for them to increase their social status and have a say in political matters. Serving in the military also provided opportunities for career advancement, as the military guaranteed a person could become a consul after serving for ten years.
Learn more about Reasons for joining the Roman army