Topic summary
Legionaries

Extracted from the Wikipedia article Legionary.
Functions
Though the legionary was first and foremost a soldier, he provided a variety of other critical functions. Lacking a professional police force, governors would use legionaries to keep the peace and protect critical facilities. As the Roman empire lacked a large civil administration, the army would often be given many administrative positions. High ranking soldiers often acted as judges in disputes among local populations and the army was an important component of tax collection. Legionaries also served to spread Roman culture throughout the provinces where they were stationed. As legionaries settled in the provinces, towns sprang up around them, often becoming large cities. In this way, as legionaries co-mingled and intermarried with the local populace, they helped Romanize the provinces they protect.