Liberation of Smyrna

The Liberation of Smyrna (İzmir'in Kurtuluşu) was the final phase of the Great Smyrna Offensive and last conflict of the Turkish Independence War. After the Turkish Army inflicted heavy losses on the Greek Army at Dumlupınar, on 30 August 1922, Greek forces were constantly retreating towards Smyrna as the Turkish Army's westward advance continued. On 9 September 1922, the Turkish Army entered Smyrna from the east (Kemalpaşa). 9 September is considered a local holiday as the Liberation of Izmir in the Province of Izmir, Turkey.

Republican People's Party
In 1923, Republican People's Party was founded by Kemal Atatürk. Atatürk chose 9th of September as the establishment date of his party as a reminder of the liberation of İzmir.