Actually Greece Invaded Turkey in WW-I.
https://en.wikipedia.org/wiki/Greco-Turkish_War_(1919%E2%80%...
Actually Greece Invaded Turkey in WW-I.
https://en.wikipedia.org/wiki/Greco-Turkish_War_(1919%E2%80%...
Greece, the nation, emerged after liberating its land from centuries of Turkish (then Ottoman) occupation (with several failed smaller scale attempts at independence in between).
After the Ottoman Empire was collapsing, the succeeding regime, the "new turks" who created Turkey, started an ethnic cleansing attempt, killing millions of Greek Pontians, Armenians, Assyrians etc.
https://en.wikipedia.org/wiki/Greek_genocide https://en.wikipedia.org/wiki/Armenian_Genocide https://en.wikipedia.org/wiki/Assyrian_genocide
After a decade of this happening, Greece (and with the assistance and encouragement of Western powers) invaded Asia Minor, where 1.5 million of Greek ethnicity were still living among the other local populations. Then the Greek army had the not so brilliant idea to march forward to the inner Turkey, and they got slashed. A massacre followed, with the Turkish army slaghtering the Greek population of Asia Minor (including in a great fire), and creating huge swarths of immigrants.
https://en.wikipedia.org/wiki/Great_Fire_of_Smyrna
So, I'd say Greece paid quite hard for that "invasion", but also that: a) 1.5 million of your people living in a place, b) some centuries of occupation, c) a decade of genocide, more or less justifies some kind of military campaign.
That land was invaded by Turkish Tribes during 12th century. So historical occupation that far cannot be justified with 20th century invasion. Greek people living in the invaded areas were around %18 of the population.
Besides, Atrocities goes both ways.
https://en.wikipedia.org/wiki/Yalova_Peninsula_massacres_(19...
https://en.wikipedia.org/wiki/Greco-Turkish_War_(1919%E2%80%...
https://en.wikipedia.org/wiki/Siege_of_Tripolitsa
https://en.wikipedia.org/wiki/Navarino_massacre
Edited for wording and some corrections.
PS: And yes, it was the ottoman empire, etc, but that's semantics.