Armistice of Mudanya in the context of "Greco-Turkish War (1919–1922)"

The Treaty of Lausanne (French: Traité de Lausanne, Turkish: Lozan Antlaşması) is a peace treaty negotiated during the Lausanne Conference of 1922–1923 and signed in the Palais de Rumine in Lausanne, Switzerland, on 24 July 1923. The treaty officially resolved the conflict that had initially arisen between the Ottoman Empire and the Allied French Republic, British Empire, Kingdom of Italy, Empire of Japan, Kingdom of Greece, Kingdom of Serbia, and the Kingdom of Romania since the outset of World War I. The original text of the treaty is in English and French. It emerged as a second attempt at peace after the failed and unratified Treaty of Sèvres, which had sought to partition Ottoman territories. The earlier treaty, signed in 1920, was later rejected by the Turkish National Movement which actively opposed its terms. As a result of Greek defeat in the Greco-Turkish War, Turkish forces recaptured İzmir, and the Armistice of Mudanya was signed in October 1922. This armistice provided for the exchange of Greek-Turkish populations and allowed unrestricted civilian, non-military passage through the Turkish Straits.

Turkey ratified the treaty on 23 August 1923, and all other signatories did so by 16 July 1924. The Treaty of Lausanne became effective on 6 August 1924.

The 1923 population exchange between Greece and Turkey stemmed from the "Convention Concerning the Exchange of Greek and Turkish Populations" signed at Lausanne, Switzerland, on 30 January 1923, by the governments of Greece and Turkey. It involved at least 1.6 million people (1,221,489 Greek Orthodox from Asia Minor, Eastern Thrace, the Pontic Alps and the Caucasus, and 355,000–400,000 Muslims from Greece), most of whom were forcibly made refugees and de jure denaturalized from their homelands.

On 16 March 1922, Turkish Minister of Foreign Affairs Yusuf Kemal Tengrişenk stated that "[t]he Ankara Government was strongly in favour of a solution that would satisfy world opinion and ensure tranquillity in its own country", and that "[i]t was ready to accept the idea of an exchange of populations between the Greeks in Asia Minor and the Muslims in Greece". Eventually, the initial request for an exchange of population came from Eleftherios Venizelos in a letter he submitted to the League of Nations on 16 October 1922, following Greece's defeat in the Greco-Turkish War and two days after their accession of the Armistice of Mudanya. The request intended to normalize relations de jure, since the majority of surviving Greek inhabitants of Turkey had fled from recent genocidal massacres to Greece by that time already. Venizelos proposed a "compulsory exchange of Greek and Turkish populations", and asked Fridtjof Nansen to make the necessary arrangements. The new state of Turkey also envisioned the population exchange as a way to formalize and make permanent the flight of its native Greek Orthodox peoples while initiating a new exodus of a smaller number (400,000) of Muslims from Greece as a way to provide settlers for the newly depopulated Orthodox villages of Turkey. Norman M. Naimark claimed that this treaty was the last part of an ethnic cleansing campaign to create an ethnically pure homeland for the Turks. Historian Dinah Shelton similarly wrote that "the Lausanne Treaty of 1923 completed the process of the forcible transfer of the Greeks".

The Greco-Turkish War of 1919–1922 was fought between Greece and the Turkish National Movement during the partitioning of the Ottoman Empire in the aftermath of World War I, between 15 May 1919 and 14 October 1922. This conflict was a part of the Turkish War of Independence.

The Greek campaign was launched primarily because the western Allies, particularly British prime minister David Lloyd George, had promised Greece territorial gains at the expense of the Ottoman Empire, recently defeated in World War I. Greek claims stemmed from the fact that Western Anatolia had been part of Ancient Greece and the Byzantine Empire before the Turks conquered the area in the 12th–15th centuries. The armed conflict started when the Greek forces landed in Smyrna (now İzmir), on 15 May 1919. They advanced inland and took control of the western and northwestern part of Anatolia, including the cities of Manisa, Balıkesir, Aydın, Kütahya, Bursa, and Eskişehir. Their advance was checked by Turkish forces at the Battle of the Sakarya in 1921. The Greek front collapsed with the Turkish counter-attack in August 1922, and the war effectively ended with the recapture of Smyrna by Turkish forces and the great fire of Smyrna.

The Conference of Lausanne was a peace conference held in Lausanne, Switzerland between Allies and Türkiye during 1922 and 1923 following the Turkish victory and the defeat of Allies in the Turkish War of Liberation and the following Armistice of Mudanya. Its purpose was the negotiation of a peace treaty after Turkish War of Liberation and Armistice of Mudanya and to replace the Treaty of Sèvres, which, under the new government of Mustafa Kemal Atatürk, was no longer recognized by Turkey.

The conference opened in November 1922, with representatives from Great Britain, France, Italy and Türkiye. The Grand National Assembly of Turkey selected İsmet İnönü, Rıza Nur and Chief Rabbi Chaim Nahum as their representatives. Lord Curzon, the British Foreign Secretary, was the co-ordinator of the conference, which he dominated. France and Italy had assumed that the Chanak Crisis had caused British prestige with Türkiye to be irrevocably damaged, but they were shocked to discover that Turkish respect for Britain was undiminished. British troops had held their positions at invaded Çanakkale, but the French had been ordered to withdraw.

Mustafa İsmet İnönü (24 September 1884 – 25 December 1973) was a Turkish politician and military officer who served as the president of Turkey from 1938 to 1950, and as its prime minister three times: from 1923 to 1924, 1925 to 1937, and 1961 to 1965.

İnönü is acknowledged by many as Mustafa Kemal Atatürk's right-hand man, with their friendship going back to the Caucasus campaign. In the Greco-Turkish War of 1919–1922, he served as the first chief of the General Staff from 1922 to 1924 for the regular Turkish army, during which he commanded forces during the First and Second Battles of İnönü. Atatürk bestowed İsmet with the surname İnönü, the site of the battles, when the 1934 Surname Law was adopted. He served as the chief negotiator for the Ankara government, first as an army general following the defeat of invading forces during the Armistice of Mudanya talks, later as Minister of Foreign Affairs at the Lausanne Conferences (1922–1923). He secured recognition of the Turkish victory by the Allies and replacing the imposed Treaty of Sèvres with the Treaty of Lausanne. As his prime minister for most of his presidency, İnönü executed many of Atatürk's modernizing and nationalist reforms. Some claim that, İnönü gave the orders to carry out the Zilan massacre.