Who was in the Roman Army?

Men that are the age of 17 or higher it was required to serve 7 years minamum before being able to back out

Most soldiers in the Roman Empire came from countries outside Italy. There were Roman soldiers from Africa, France, Germany, the Balkans, Spain and the Middle East. Soldiers had to stay in the army for at least 25 years! Then they could retire, with a pension or a gift of land to farm.