Hey what persian hoplites did you refer? Shipri Thukul carry maces, not swords... And Kardaka Arthensar's sword are certainly the thin one (yes, they are long, but compare with Gaesatae / Milhant longswords and they are thin longswords, lack in power)

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If you refer to the Nayakarakhan Tiknapah... they allready got longswords lethality...