What happens in the end of Julius Caesar?

At the end of this play, Rome finally regains its order and
peace.  The war between the various major characters finally ends.  In its place, Octavius and
Antony become the two men who indisputably have the most power in
Rome.

Through most of the play, there has been discord in Rome.  The
way that the play ends resolves much of this discord.  Brutus and Cassius essentially both commit
suicide.  By doing this, they are paying for the discord that they have caused.  Meanwhile,
Octavius and Antony are trying to take actions that will reunite Rome.  Octavius has his
prisoners treated well, Antony speaks well of the dead Brutus.

So,
at the end of the play, at least, there is harmony in Rome once again.