What is "immunes"

n. (plural of immune English)

Ancient Rome's military was highly advanced for its time, divided into multiple units to maximize efficiency and power. One such unit was the immune class. By definition, the immunes were legionary soldiers who possessed specialized skills, qualifying them to perform duties atypical of a Roman soldier. Immunes’ expertise in their respective fields allowed them to be exempt from the more tedious and dangerous tasks other soldiers were required to do, such as ditch digging and rampart patrol.