They served what is called civic duty, they do this because the Roman officials wanted to make sure that the government was the best it can be, in other words, powerful.
The Roman citizens have to pay taxes, serve in the military, and serve as jurors because the government wanted to make sure that the government stays strong. In other words, this would be called a "Civic Duty."
Definition:
Civic Duty:
A civic duty is the contributions a citizen in a place makes to better the government. The citizens could contribute to the government by serving the military, jury duty, pay taxes, vote, and etc.
Explanation:
The Roman citizens had to serve in the military, pay taxes, serve jury duty, and etc because it was a way to make the government better and more stabled. When a citizen pays their taxes, they are helping the government a lot by giving money to the government to spend on things that would help out the economy. For example, in the Roman Empire, the government would use its tax money to get materials for military equipment, pay to build more roads and buildings, support families, and etc. There are many more ways the government could use the money from citizens paying their taxes to better the economy.
The Roman Citizens served the military to make the government more power. Because the Roman Citizens serve in the military, it shows the other empires around the Roman Empire that the government is very powerful, since they would have a very good and powerful army. Back in the Roman Empire days, a powerful army meant that the empire has a powerful government, and it showed other empires to not mess with them, unless if they want to lose.
The Roman citizens also served jury duty, and that helped better the government. The reason why citizens serving jury duty betters the government is because it helps the government stay on track with the citizens and them following the laws that has been placed down by the government. It makes the government look good because the government knows that there are citizens that are helping with the judicial things and making sure that the cases in the Empire are following the law, and if the people in the cases are doing things against the law, the jury will help the government make the decision.
