man-at-arms

A man-at-arms was a soldier of the High Medieval to Renaissance periods who was typically well-versed in the use of arms and served as a fully-armoured heavy cavalryman. A man-at-arms could be a knight, or nobleman, a member of a knight's or nobleman's retinue, or a mercenary in a company serving under a captain. Such men could serve for pay or through a feudal obligation. The terms knight and man-at-arms are often used interchangeably, but while all knights equipped for war were men-at-arms, not all men-at-arms were knights.