SUMMARY OF THE BACKGROUND TO ANTIGONE:
Antigone is the third (in terms of its story) of the three "Theban Plays" of Sophocles. Since, unlike Greek audiences, we don't already know the plot, a brief summary of the earlier plays is helpful. The names in capital letters are characters in the play Antigone or are important to it..
Oedipus was born to the then king and queen of Thebes (Laius and Jocasta). Because of a prophecy that Oedipus would kill his father, the king gave Oedipus to a shepherd to be killed. The shepherd had pity on the baby and instead gave him to the king of Corinth to raise as his own. So Oedipus grew up ignorant of his birth and true parents.
As an adult, he hears a prophecy that he will kill his father and marry his mother. He flees to avoid the possibility of it coming true. On the road, he is attacked by a traveling party, and kills them, unaware that one of them is his real father. He comes to Thebes, becomes a hero there, marries the widowed queen, (his mother, Jocasta), and becomes King of Thebes. They have four children, two boys and two girls (ANTIGONE and ISMENE).
Eventually, Oedipus learns the truth, that he has inadvertently killed his father and married his mother. Horrified, he blinds himself and renounces the throne. Jocasta kills herself. Her brother, CREON, becomes temporary king and exiles Oedipus. Oedipus becomes a wandering beggar with the help of his daughters, eventually winning the pity of the furies and dying peacefully.
The younger of Oedipus's two sons (ETEOCLES)becomes part of Creon's court and presumably will become king, the older (POLYNICES), feeling he should be king, flees and raises an army at Argos to attack Thebes.
Just before our play begins the two brothers kill each other: Eteocles defending Thebes, Polynices attacking with the men from Argos. Because of their deaths, Creon will be able to claim the throne for himself. The two daughters of Oedipus, Antigone and Ismene, have returned to Creon's court: and Antigone is engaged to Creon's son, HAEMON.