 Nyorai kupfuurira kweiyi ndima - Nemhaka yezvikwereti zvinokura, SPAP yakauya mukutonga kwehurumende pakati pa1939 na1940. Mukati mokugara kweAxis yeGreece 1941-44, Athens yaidzorwa nemauto eGermany, uye mutsara wakashandiswa kutakura mauto nezvombo. Mukati pokugara uye zvikurukuru mukati mokubva kweGermany muna 1944, network yakakuvadzwa zvikuru nezvose zveuto reGermany uye mapoka echiGiriki ekudzivirira. Kutsiva njanji nemidziyo inotenderera kwakatora nguva pashure pehondo yevagari vemo, nemigove yebasa yenguva dzose yakatangazve munenge muna 1948. Muna 1954 SPAP yakaitwazve nyika. Muna 1962 SPAP yakabatanidzwa kuva SEK. Muna 1970 OSE yakava mutsivi wepamutemo weSEK, ichitora mutoro wezvakawanda zvezvivakwa zvezvitima zveGreece. Musi wa 1 Ndira 1971 chiteshi, uye zvizhinji zvezvivakwa zvechitima cheGreek zvakaendeswa ku Hellenic Railways Organisation SA, mubatanidzwa wehurumende. Kutakurwa kwezvinhu kwakaderera zvikuru apo hurumende yakatemera OSE kutakura kwezvinhu zvokurima uye mafetiraiza yakaguma mukutanga kwema1990. Zviteshi zviduku zvakawanda zvomugwagwa zvaiva nevanhu vashoma zvakavharwa. Muna 2005, chiteshi chakavharwa nokuda kwekuvandudzwa kukuru kubvumira njanji itsva yemuguta kuti ishandise chiteshi. Musi wa4 Chikumi 2007, kugadziriswa kwayo kwakakura uye kubatanidzwa mune itsva suburban njanji network kwakapedzwa. Muna 2009, nechikwereti cheGreek chikwereti chakanga chichienderera mberi, manejimendi eOSE akamanikidzwa kuderedza masevhisi pamambure. Nguva dzokufamba dzakaderedzwa uye migwagwa yakavharwa, sezvo sangano rinotungamirirwa nehurumende rakaedza kuderedza mari inoshandiswa. Muna 2017, chikamu chekutakura vanhu cheOSE chakaitwa kuti chive chakazvimiririra sezvo TrainOSE, parizvino, iri chikamu cheFerrovie dello Stato Italiane, chakaramba chiri pasi pekutonga kweOSE. 