Three primary elements characterized feudalism: lords, vassals and fiefs; the structure of feudalism can be seen in how these three elements fit together. A lord was a noble who owned land, a vassal was a person who was granted possession of the land by the lord, and the land was known as a fief. In exchange for the fief, the vassal would provide military service to the lord. The obligations and relations between lord, vassal and fief form the basis of feudalism.
For more information on this system that is roughly the equivalent of the Umbresh system, go here to save me some typing time http://en.wikipedia.org/w...eudalism#Characteristics
This post will be edited further as I put more info in