What was feudalism and how did it work ss

Feudal society is a military hierarchy in which a ruler or lord offers mounted fighters a fief (medieval beneficium), a unit of land to control in exchange for a military service. The individual who accepted this land became a vassal, and the man who granted the land become known as his liege or his lord. :)

I'm going to go with 1,982 feet because of all of the ice.                                               ps its this is not the answer go with d 6,500.