Helen received a great deal of blame for the Trojan War,even though from the beginning it is clear that the gods were using her for their own plans. (Her father was blamed by some for her infidelity.) In the Classical period, debating Helen’s fault was an established rhetorical practice. But one of the earlier and more creative responses about the whole affair was a “shaggy” defense: it wasn’t her! It was someone who looked like her:

“This is not the true tale:
You never went in the well-benched ships
You did not go to the towers of Troy…
[It is a fault in Homer that
He put Helen in Troy
And not her image only;
It is a fault in Hesiod
In another: there are two, differing
Recantations and this is the beginning.
Come here, dance loving goddess;
Golden-winged, maiden,
As Khamaileôn put it.
Stesichorus himself says that
an image [eidolon] went to troy
and that Helen stayed back
with Prôteus…”

οὐκ ἔστ’ ἔτυμος λόγος οὗτος,
οὐδ’ ἔβας ἐν νηυσὶν ἐυσσέλμοις
οὐδ’ ἵκεο πέργαμα Τροίας,
[ μέμ-
φεται τὸν ῞Ομηρο[ν ὅτι ῾Ε-
λέ]νην ἐποίησεν ἐν Τ[ροίαι
καὶ οὐ τὸ εἴδωλον αὐτῆ[ς, ἔν
τε τ[ῆι] ἑτέραι τὸν ῾Ησίοδ[ον
μέμ[φετ]αι· διτταὶ γάρ εἰσι πα-
λινωιδλλάττουσαι, καὶ ἔ-
στιν ἡ μὲν ἀρχή· δεῦρ’ αὖ-
τε θεὰ φιλόμολπε, τῆς δέ·
χρυσόπτερε παρθένε, ὡς
ἀνέγραψε Χαμαιλέων· αὐ-
τὸ[ς δ]έ φησ[ιν ὁ] Στησίχορο[ς
τὸ μὲν ε[ἴδωλο]ν ἐλθεῖ[ν ἐς
Τροίαν τὴν δ’ ῾Ελένην π[αρὰ
τῶι Πρωτεῖ καταμεῖν[αι· …

Herodotus tells this story too.