An agreement between two groups of nobles-lords and vassals.
Equality.
The agreement that served as the basis for feudalism was the feudal contract. This contract was a mutually beneficial agreement between a lord and a vassal. The lord granted land and protection to the vassal, who in return provided military service and other forms of support to the lord.
beacause they were losers
Vassalage is the relationship between the feudal lord and his vassal. Kings had higher lords as vassals, and higher lords had lower lords as vassals. The practice was called subinfeudation.
vassals
protection
it wasn't a who , it was magna carta, a feudal document.
Vassals
The vassals helped by keeping control of the armies and having the Kings reward them with land.
The lords promised to give their vassals protection and fiefs, or estates.
Yes, vassals can have children. Their children may inherit their titles and lands, continuing the family's lineage and influence within the feudal system.