Question

The chorus is an important element of drama. In Antigone, it serves multiple purposes, such as providing background information about events that occurred before the start of the play. Which lines in this excerpt from Antigone serve the purpose of describing recent events?
CHORUS:
But ere a torch our crown of towers could burn,
Ere they had tasted of our blood, they turn
Forced by the Dragon; in their rear
The din of Ares panic-struck they hear.
For Zeus who hates the braggart's boast
Beheld that gold-bespangled host;
As at the goal the paean they upraise,
He struck them with his forked lightning blaze.

To earthy from earth rebounding, down he crashed;
The fire-brand from his impious hand was dashed,
As like a Bacchic reveler on he came,
Outbreathing hate and flame,
And tottered. Elsewhere in the field,
Here, there, great Area like a war-horse wheeled;
Beneath his car down thrust
Our foemen bit the dust.

Seven captains at our seven gates
Thundered; for each a champion waits,
Each left behind his armor bright,
Trophy for Zeus who turns the fight;
Save two alone, that ill-starred pair
One mother to one father bare,
Who lance in rest, one 'gainst the other
Drave, and both perished, brother slain by brother.

Now Victory to Thebes returns again
And smiles upon her chariot-circled plain.
Now let feast and festal should
Memories of war blot out.
Let us to the temples throng,
Dance and sing the live night long.
God of Thebes, lead thou the round.
Bacchus, shaker of the ground!

Answer 1

I believe the third stanza is the correct answer:
Seven captains at our seven gates
Thundered; for each a champion waits,
Each left behind his armor bright,
Trophy for Zeus who turns the fight;
Save two alone, that ill-starred pair
One mother to one father bare,
Who lance in rest, one 'gainst the other
Drave, and both perished, brother slain by brother.

These lines tell the story of what happened immediately prior to the play Antigone. It describes the events of when her two brothers fought and kill each other in battle, which is the reason why the play Antigone exists. The first two stanzas describe events from a long time ago, and the fourth one are current events. The third one gives a background to the story, which is why I'd pick that option.