man-at-arms man-at-arms /ˈmænətˈɑːrmz/

noun

1. A heavily armed and mounted soldier in medieval times  ( man-at-arms )
   a heavily armed and mounted soldier in medieval times
    In medieval times, a man-at-arms would be equipped with armor and weapons to serve his lord.
   In medieval times, a man-at-arms would be equipped with armor and weapons to serve his lord.