A heavily armed and sometimes mounted soldier in medieval times.

A soldier holding his land, generally 60-120 acres, specifically in exchange for military service. Sometimes called a Yeoman. (MEDIEV-L. Medieval Terms) Any mounted fighting man who wore armour. (Wise, Terence. Medieval Warfare, 250)

miles A soldier holding his land specifically in return for military service.

A soldier, fighting man and loyal retainer. Here, either a Billman or an Arquebusier (gunner). Use Soldier details. Billman has 2-handed Axe skill; Arquebusier has Black Powder Weapon skill (0% Base Chance, Manipulation skill).

Man-at-arms (or sometimes armsman) was a medieval term for a soldier, almost always a professional. It was most often used to refer to men in a knight's or lord's retinue who were well-equipped and well-trained (deriving from having men under arms - meaning to be trained in the use of arms).