Although Pompey never actually appears in this play he is important in helping to set the play's action in motion. He was a political and military leader of Rome who joined with Caesar, and a third man, Marcus Crassus, to form a ruling group which came to be informally known as the First Triumvirate. However, divisions among the three soon followed. At the start of the play Caesar has just triumphed in battle over Pompey and the crowds in Rome are celebrating his victory. This is the event that leads Marcus Brutus and other Roman nobles to worry that Caesar might now be set on grabbing all power for himself and becoming a dictator. They decide therefore to eliminate him. The murder of Caesar is the central event of the play.