Bayan Byzantium, Spartans sun yi zargin cewa suna ɗokin kawo ƙarshen shiga cikin yakin.Spartans suna da ra'ayin cewa, tare da 'yantar da babban yankin Girka da kuma garuruwan Girka na Asiya Ƙarama, an riga an cimma manufar yakin.Hakanan ana jin cewa tabbatar da tsaro na dogon lokaci ga Girkawa na Asiya ba zai yiwu ba.Bayan Mycale, Sarkin Spartan Leotychides ya ba da shawarar dasa duk Helenawa daga Asiya Ƙarama zuwa Turai a matsayin hanya ɗaya tilo ta 'yantar da su ta dindindin daga mulkin Farisa .Xanthippus, kwamandan Atheniya a Mycale, ya yi fushi da rashin amincewa da wannan;Garuruwan Ionian asalin ƙasar Atheniya ne, kuma mutanen Atina, idan babu wani, za su kare Ionian.Wannan ya nuna ma'anar da jagorancin Ƙungiyar Girika ta Girika ta wuce ga mutanen Athens.Tare da janyewar Spartan bayan Byzantium, jagorancin Athens ya zama bayyane.Sparta da ƙungiyar Peloponnesia sun mamaye ƙawancen ƙawancen ƙasashen birni waɗanda suka yi yaƙi da mamayewar Xerxes.Tare da janyewar wadannan jihohi, an yi kira ga wani babban taro a tsibirin Delos mai tsarki don kafa sabuwar kawance don ci gaba da yaki da Farisa.Wannan ƙawance, wanda yanzu ya haɗa da yawancin tsibiran Aegean, an ƙirƙira shi azaman 'Ƙungiyar Athenian Farko', wacce aka fi sani da Delian League.A cewar Thucydides, a hukumance manufar kungiyar ita ce "ramuwar gayya ga laifuffukan da suka sha ta hanyar lalata yankin sarki".A haƙiƙa, an raba wannan buri zuwa manyan ƙoƙarce-ƙoƙarce guda uku—na shirya don mamayewa a nan gaba, neman ramuwar gayya ga Farisa, da shirya hanyar raba ganima.An baiwa mambobin zabin ko dai su ba da sojoji ko kuma su biya haraji ga baitul malin hadin gwiwa;yawancin jihohi sun zaɓi haraji.