+A fief was a central element of [Feudalism](/wiki/feudalism), typically a tract of land granted by a [lord](/wiki/lord) to a [vassal](/wiki/vassal). In exchange for this land, the vassal pledged loyalty and service, often military, creating a bond central to medieval society.
+## See also
+- [Manor](/wiki/manor)
+- [Knight](/wiki/knight)
+- [Serf](/wiki/serf)
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