Complex sentence: Neoptolemus then tries to talk Philoctetes into coming to Troy by his own free will, but to no avail, and in the end Neoptolemus consents to take Philoctetes back to Greece, even though that means that he will be exposed to the anger of the army.
Split into simpler sentences: Neoptolemus then tries to talk Philoctetes into coming to Troy by his own free will, but Philoctetes will not agree. In the end Neoptolemus consents to take Philoctetes back to Greece, even though that means that he will be exposed to the anger of the army.