Earl Marshal

In England, the Earl Marshal is the King's Marshal, in charge of the summoning of the feudal army (ie. the marshalling of the forces). Later, the Earl Marshal also became the final authority on matters of heraldry and eventually the head of the English College of Arms once it was established. Prior to this there had been Kings of Arms with no one expressly senior.

The SCA Earl Marshal

In the SCA, the Earl Marshal is the title given to the Kingdom Marshal. All marshals in the kingdom act with his authority and under his guidance. He is one of the key authorities if any reviews or changes are to be made to the Kingdom or Society's rules of combat.