The term FEE, FIE, FOE is a phrase used to describe the three types of people in a feudal system. FEE stands for Feudal Lord, FIE stands for Vassal, and FOE stands for Serf. The Feudal Lord was the highest ranking person in the system and owned all the land. The Vassal was the next highest ranking person and was granted land by the Feudal Lord in exchange for loyalty and service. The Serf was the lowest ranking person and was bound to the land, working it for the Feudal Lord and Vassal.