The Feudal System-Extension Task

Father Francois, you are my honored guest. Please allow me to explain the Feudal system to you before you ask any questions of me. I am but a simple farmer, a worker on the Kings land. The vassal a citizens  of the King entrusted with land, accept he would loose his possession if he did not obey the oath that he had sworn. Although the King owned the land, the vassal could lend the land to other vassal's while the vassals can ask peasants to work on the land for protection and so becoming a lord themselves.