Ceasar defeated pompey's son
Pompey
Because the play was about Julius Caesar. Moreover, in real history after his death there was a civil war between the supporters and the opponents of Caesar.
In ancient Greek drama a chorus is a group of actors who commented on the action of the play in unison. Those plays were written hundreds of years before Julius Caesar lived. There is no chorus in Shakespeare's play Julius Caesar.
51bc at the battle of Alesia.
Cassius, in Shakespeare's Julius Caesar, is the instigator in the plot to murder Caesar, which is introduced at the start of the play
The primary subject of the play Julius Caesar is the conspirators who plotted against Julius Caesar. It portrays the conspiracy again Julius Caesar, his assassination, and the defeat of the conspirators at the Battle of Philippi.
Pompey
There are 5 acts in Julius Caesar. "The Tragedy of Julius Caesar" is a play-specifically, a tragedy-written by Shakespeare, which portrays the conspiracy against Roman dictator Julius Caesar and his ultimate defeat at the Battle of Phillipi.
Because the play was about Julius Caesar. Moreover, in real history after his death there was a civil war between the supporters and the opponents of Caesar.
Not a character in the play, but a topic of discussion. Historically, Julius Caesar defeated his rival Pompey and his sons in a series of civil wars before becoming sole dictator of Rome. The play starts just after the last of these battles. The common people are celebrating the victory, but the tribunes remind them that this was a defeat of Romans and great Romans at that. "Knew you not Pompey?" reminds them of that fact.
Caesar defeated Pompey and his supporters in 44 BC
Caesar's ghost turns up to annoy Brutus before the battle at Philippi.
Egypt
Sulla
Publius in the play Julius Caesar. In Act II scene 2, at the end right before sceen three. Publius: Good morrow, Caesar.
There have been several movies made based on Shakespeare's Julius Caesar, and you would have to specify which one you are talking about before it could be compared to the play.
Caesar defeated Ptolemy XIII, Cleopatra's brother/husband in Egypt.