A baron is responsible first to his king and second to the people who liv on his manor.  The king might require the baron to serve in the military or engage in various other activities.  By complying with the King’s requirements the Baron is possibly able to earn a higher title, more land, or prosperous marriages for his children and other family members. As a percentage of each manor’s crops is sent to the King, a baron also has to make sure that all of the serfs on his estate are protected in order to ensure that a plentiful crop is produced.  A baron also sometimes serves as judges in a court of crime or passes out sentences in court. -