Zone of Smyrnaball was a short-lived Greek occupied zone of Turkeyball following the defeat of the Ottoman Empireball during WWI. Zone of Smyrnaball was militarily occupied by Kingdom of Greeceball and was going to be annexed due to the population of Anatolian Greeks that lived in the area. However, following the outbreak of the Turkish War of Independence, Zone of Smyrnaball was invaded and annexed by Turkeyball, forcing the Greeks there to forcibly migrate in a population exchange agreed upon by the Treaty of Lausanne.
Partition of the Ottoman Empire and Occupation
When WWI came to an end, the territories that were once encompassed by Ottoman Empireball were now being negotiated by the victorious powers in hopes of seeing them annexed. One of these areas was that of the city of İzmirball (then called Smyrna) and the surrounding region it possessed. Originally promised to Kingdom of Italyball, the region was offered to Kingdom of Greeceball in an effort to get them to join on the side of the Entente Powers against the Ottoman Empireball in WWI, an offer the Greeks accepted. With the Armstice of Mudros came the end of the Ottoman Front in WWI, leading to the construction of the Treaty of Sevres.
Kingdom of Italyball, French Third Republicball, and Kingdom of Greeceball all wanted to annex Smyrnaball, but considering the Greek majority in the area and the fact that they had received the support of their claims from UKball, the latter looked to be the favorable faction to take control of the area. Kingdom of Italyball was not happy with this decision (along with the decision to not give them Fiumeball) and so their delegation stormed out as Italian troops landed in Antalyaball and were preparing to march towards Smyrna. Seeing this as a threat to agreed territorial ideas combined with the notion that Turkish revolts were rising across all of Anatolia (thus endangering the Christian population of Smyrnaball) UKball and USAball approved of Kingdom of Greeceball militarily occupying the area (although they didn't recognize Greek sovereignty over the area).
On the 14th of May, Kingdom of Greeceball declared that it was going to be landing in Smyrnaball, much to the applause of the Greeks and protest of the Turks. On the 15th the Greeks landed in Smyrnaball and were greeted by a friendly crowd. A regiment landed a bit north from where they were supposed to be based and thus began to march south, walking past an Ottoman barracks, It is not known who had shot first, but a fire-fight and erupted, with the Ottoman barracks eventually surrendering and the Greeks allegedly being responsible for the looting and killing of unarmed Turkish troops and civilians. The Greeks then began to take over neighboring towns and cities, with the troops being responsible for massacres (along with Turkish irregular troops) and a victory at the Battle of Aydin. Reactions to the violence associated with the landings helped unite Turkish resistance groups into the Government of the Grand National Assemblyball, with the Turks engaging in protests against the Occupation of Smyrnaball. European Ambassadors found Kingdom of Greeceball largely responsible for the bloodshed but little to no change was made (apart from them reminding the Greeks that this occupation was not permanent, resulting in Venezeilos's government storming out of the negotiations). A line was established to not see Greek troops advance further across the "Milne Line".
Greek Administration in the Zone of Smyrna and the Greco-Turkish War
Kingdom of Greeceball appointed a high commissioner to the now created Zone of Smyrnaball with his main goal being that of curbing the ethnic violence that was erupting in the area. The high-commissioner was very strict against any and all acts of discrimination against the Turkish population, putting himself at odds against the Church and Troops (but was supported by the Greek PM, Eleutherios Venezeilos). Zone of Smyrnaball kept the old administrative system of Ottoman Empireball but replaced the higher-ups with Greeks whilst lower positions were given to the Turks. Greek refugees that were previously expelled from Ottoman Empireball were repatriated to their old homes in Anatolia, however, Greek hostility from both Troops and Civilians saw Turks migrate from Smyrna, causing another refugee crisis.
However, Zone of Smyrnaball soom became a sort of base for Kingdom of Greeceball to launch an offencive against the newly formed Grand National Assemblyball as a part of the larger Greco Turkish War. With support from the allies, the Greeks began their summer offensive and crossed the Milne Line in 1920. Kingdom of Greeceball's military control of Zone of Smyrnaball was officially recognized from the signing of the Treaty of Sevres (agreeing to Turkish suzerainty and a 5 year-long military occupation of the area). However, with Venezeilos's loss of power saw the Italians and French back off from their economic obligations to Zone of Smyrnaball, leaving UKball the only force supportive of Greek occupation.
With the Greek defeat in the Battle of Sakarya came the retreat back into the borders of the Zone of Smyrnaball, resulting in mass atrocities by Turkish and Greek troops. Greek troops evacuated Zone of Smyrnaball in 1922, with the next day seeing troops of Grand National Assemblyball enter the city (met by friendly Turkish crowds) as Turkish irregulars began a campaign of atrocities against Greeks and Armenians. Culminating in the lynching of a Greek Orthodox Bishop and the Burning of Smyrna (which saw Greek and Armenian living areas torched), the Turks refer to this moment as "The Liberation of İzmirball, thus leading to the annexation and destruction of Zone of Smyrnaball.