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 other 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. Though in English the term man-at-arms is a fairly straightforward rendering of the French homme d'armes, in the Middle Ages, there were numerous terms for this type of soldier, referring to the type of arms he would be expected to provide: In France, he might be known as a lance or glaive, while in Germany, Spieß, Helm or Gleve, and in various places, a bascinet. In Italy, the term barbuta was used, and in England from the late 14th century, men-at-arms were known as lances or spears. In the Early Medieval period, any well-equipped horseman could be described as a "knight", or in Latin, miles. In the course of the 12th century knighthood became a social rank with a distinction being made between milites gregarii (non-noble cavalrymen) and milites nobiles (true knights). As a fully armoured cavalryman could be of a lesser social status than a knight, an alternative term describing this type of soldier came into use which was, in French, homme d'armes or gent d'armes, and in English man-at-arms. This evolution differed in detail and timeline across Europe but by 1300, there was a clear distinction between the military function of the man-at-arms and the social rank of knighthood. The term man-at-arms thus primarily denoted a military function, rather than a social rank. The military function that a man-at-arms performed was serving as a fully-armoured heavy cavalryman; though he could, and in the 14th and 15th centuries often did, also fight on foot.