Here are the possible solutions for of serfs and vassals clue
Answer
Clue
Relevancy
feudal
Clue
Of serfs and vassals
Definition
pertaining to an ancient political and economic system
feudalism
Clue
System of lords and vassals
Definition
the feudal system; a system by which the holding of estates in land is made dependent upon an obligation to render military service to the king or feudal superior
feudalstate
Clue
Society with vassals and fiefs
esnes
Clue
Vassals
Definition
ESNE, (historical) a domestic slave in Old English times
fealty
Clue
It's required of vassals
Definition
the vassal's obligation of loyalty to his feudal lord
feods
Clue
Vassals' lands: Var.
Definition
FEOD, a fief or land held on condition of service
fiefs
Clue
Vassals' lands
Definition
FIEF, a feudal estate
lieges
Clue
Vassals
Definition
LIEGE, (historical) a person under a feudal tenure; a vassal or feudal lord