In your own words and simple language, briefly summarize the meaning of this next portion of the First Choral Ode:

CHORUS LEADER
Against our land he marched,

sent here by the warring claims

of Polyneices, with piercing screams,

an eagle flying above our land,

covered wings as white as snow,

and hordes of warriors in arms,

helmets topped with horsehair crests.

The Chorus Leader is explaining how a army led by Polyneices is attacking their land. The soldiers are making loud noises like an eagle flying above them with white wings, and they are dressed in armor with horsehair crests on their helmets.