Answer:

overlord

AnswerCrossword Clue
OVERLORDBoss of bosses
OVERLORDOperation ... (military campaign launched on D-Day)
OVERLORDOperation headed up by Eisenhower
OVERLORDWorld War II Operation.
OVERLORDHistoric operation of W. W. II.
OVERLORDSupreme ruler.
OVERLORDDomineer
OVERLORDRuler
OVERLORDBoss
OVERLORDOperation ... (D-Day invasion)
OVERLORDFeudal system big shot
OVERLORDOppressive boss