Treaty of Lausanne

Stipulations

The treaty was composed of 143 articles with major sections including:

The treaty provided for the independence of the Republic of Turkey but also for the protection of the Greek Orthodox Christian minority in Turkey and the Muslim minority in Greece. However, most of the Christian population of Turkey and the Muslim population of Greece had already been deported under the earlier Convention Concerning the Exchange of Greek and Turkish Populations signed by Greece and Turkey. Only the Greek Orthodox population of Constantinople, Imbros and Tenedos (about 270,000 at that time), and the Muslim population of Western Thrace (about 129,120 in 1923) were excluded. Article 14 of the treaty granted the islands of Imbros (Gökçeada) and Tenedos (Bozcaada) "special administrative organisation", a right that was revoked by the Turkish government on 17 February 1926. Turkey also formally accepted the loss of Cyprus (which had been leased to the British Empire following the Congress of Berlin in 1878, but de jure remained an Ottoman territory until World War I). The fate of the province of Mosul was left to be determined through the League of Nations. Turkey also explicitly renounced all claims to the Dodecanese Islands, which Italy had been obliged to return to Turkey according to Article 2 of the Treaty of Ouchy in 1912 following the Italo-Turkish War (1911–1912).

Summary of contents of treaty

Borders

The treaty delimited the boundaries of Greece, Bulgaria, and Turkey. Specifically, the treaty provisioned that all the islands, islets and other territories in the Aegean Sea (Eastern Mediterranean in the original text) beyond three miles from the Turkish shores were ceded to Greece, with the exception of Imbros, Tenedos and Rabbit islands (Articles 6 and 12). There is a special notation in both articles, that, unless it is explicitly stated otherwise, the Turkish sovereignty extends three miles from Asia Minor shores. The Greek population of Imbros and Tenedos was not included in the population exchange and would be protected under the stipulations of the protection of the minorities in Turkey (Article 38).

The major issue of the war reparations, demanded from Greece by Turkey, was abandoned after Greece agreed to cede Karaağaç to Turkey.

Turkey also formally ceded all claims on the Dodecanese Islands (Article 15); Cyprus (Article 20); Egypt and Sudan (Article 17); Syria and Iraq (Article 3); and (along with the Treaty of Ankara) settled the boundaries of the latter two nations.

The territories to the south of Syria and Iraq on the Arabian Peninsula, which still remained under Turkish control when the Armistice of Mudros was signed on 30 October 1918, were not explicitly identified in the text of the treaty. However, the definition of Turkey's southern border in Article 3 also meant that Turkey officially ceded them. These territories included the Mutawakkilite Kingdom of Yemen, Asir and parts of Hejaz like the city of Medina. They were held by Turkish forces until 23 January 1919.

By Articles 25 and 26 of the Treaty of Lausanne, Turkey officially ceded Adakale Island in the Danube River to Romania by formally recognizing the related provisions in the Treaty of Trianon of 1920. Due to a diplomatic irregularity at the 1878 Congress of Berlin, the island had technically remained part of the Ottoman Empire.

Turkey also renounced its privileges in Libya which were defined by Article 10 of the Treaty of Ouchy in 1912 (per Article 22 of the Treaty of Lausanne in 1923.)

Agreements

Among many agreements, there was a separate agreement with the United States, the Chester concession. In the United States, the treaty was opposed by several groups, including the Committee Opposed to the Lausanne Treaty (COLT), and on 18 January 1927, the United States Senate refused to ratify the treaty by a vote of 50–34, six votes short of the two-thirds required by the Constitution. Consequently, Turkey annulled the concession.

Besides, Turkey was obliged to instate four European advisors on juridical matters for five years. The advisors were to observe a juridical reform in Turkey. The advisors contract could be renewed if the suggested reforms would not have taken place. Subsequently, Turkey worked on and announced a new Turkish constitution and reformed the Turkish justice system by including the Swiss Civil code, the Italian criminal law and the German Commercial law before completion of the five years in question.

Declaration of Amnesty

Annex VIII to the treaty, called "Declaration of Amnesty", granted legal immunity to any Turkish or Greek resident who between 1914 and 1922 committed acts "on account of any military or political action taken by him, or any assistance of any kind given by him to a foreign Power signatory of the treaty of peace." The treaty thus put an end to the effort to prosecute Ottoman war criminals for crimes such as the Armenian genocide, the Sayfo, the Greek genocide, and codified impunity for these crimes.

Legacy

The Treaty of Lausanne led to the international recognition of the sovereignty of the new Republic of Turkey as the successor state of the Ottoman Empire. As result of the Treaty, the Ottoman public debt was divided between Turkey and the countries which emerged from the former Ottoman Empire. The convention on the Straits lasted for thirteen years and was replaced with the Montreux Convention Regarding the Regime of the Straits in 1936. The customs limitations in the treaty were shortly after reworked.

For Greece, the treaty brought to an end the impetus behind the Megali Idea, the notion that modern Greece should encompass those territories in Asia Minor which had been populated with Greek speakers for up to 3000 years and which also formed the core of the Eastern Roman Empire.

Hatay Province remained a part of the French Mandate of Syria according to the Treaty of Lausanne, but in 1938 gained its independence as the Hatay State, which later joined Turkey after a referendum in 1939. Political amnesty was given to opponents of the new Turkish regime but the government reserved the right to make 150 exceptions. The 150 personae non gratae of Turkey (mostly descendants of the Ottoman dynasty) slowly acquired citizenship – the last one in 1974.

Lloyd George declared the treaty an "abject, cowardly and infamous surrender".

Historian Norman Naimark states, "The Lausanne Treaty served as a pivotal international precedent for transferring populations against their will throughout the twentieth century."

Historian Ronald Grigor Suny states that the treaty "essentially confirmed the effectiveness of deportations or even murderous ethnic cleansing as a potential solution to population problems".

Historian Hans-Lukas Kieser states, "Lausanne tacitly endorsed comprehensive policies of expulsion and extermination of hetero-ethnic and hetero-religious groups, with fatal attraction for German revisionists and many other nationalists".

Conspiracy theories

The Treaty of Lausanne has given rise to a number of Islamist conspiracy theories in Turkey to defame the post-war Turkish secular nationalist rule of the country. For example, it has been claimed that the treaty was signed to be effective for a century and there are "secret articles" in the treaty regarding Turkey's mining of natural resources. One conspiracy theory that had following in the 2010s held that the treaty would expire in 2023 and Turkey would be allowed to mine boron and petroleum. This appears not to have happened.