HOME

TheInfoList



OR:

The (Montreux) Convention regarding the Regime of the Straits, often known simply as the Montreux Convention, is an
international agreement A treaty is a formal, legally binding written agreement between actors in international law. It is usually made by and between sovereign states, but can include international organizations, individuals, business entities, and other legal per ...
governing the
Bosporus The Bosporus Strait (; grc, Βόσπορος ; tr, İstanbul Boğazı 'Istanbul strait', colloquially ''Boğaz'') or Bosphorus Strait is a natural strait and an internationally significant waterway located in Istanbul in northwestern Tu ...
and
Dardanelles The Dardanelles (; tr, Çanakkale Boğazı, lit=Strait of Çanakkale, el, Δαρδανέλλια, translit=Dardanéllia), also known as the Strait of Gallipoli from the Gallipoli peninsula or from Classical Antiquity as the Hellespont (; ...
Strait A strait is an oceanic landform connecting two seas or two other large areas of water. The surface water generally flows at the same elevation on both sides and through the strait in either direction. Most commonly, it is a narrow ocean chann ...
s in
Turkey Turkey ( tr, Türkiye ), officially the Republic of Türkiye ( tr, Türkiye Cumhuriyeti, links=no ), is a transcontinental country located mainly on the Anatolian Peninsula in Western Asia, with a small portion on the Balkan Peninsula in ...
. Signed on 20 July 1936 at the Montreux Palace in
Switzerland ). Swiss law does not designate a ''capital'' as such, but the federal parliament and government are installed in Bern, while other federal institutions, such as the federal courts, are in other cities (Bellinzona, Lausanne, Luzern, Neuchâtel ...
, it went into effect on 9 November 1936, addressing the long running Straits Question over who should control the strategically vital link between the
Black Black is a color which results from the absence or complete absorption of visible light. It is an achromatic color, without hue, like white and grey. It is often used symbolically or figuratively to represent darkness. Black and white have of ...
and
Mediterranean The Mediterranean Sea is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean Basin and almost completely enclosed by land: on the north by Western and Southern Europe and Anatolia, on the south by North Africa, and on the ea ...
seas. The Montreux Convention regulates maritime traffic through the Turkish Straits. It guarantees "complete freedom" of passage for all civilian vessels in times of peace. In peacetime, military vessels are limited in number, tonnage and weaponry, with specific provisions governing their mode of entry and duration of stay. If they want to pass through the Strait, warships must provide advance notification to the Turkish authorities, which, in turn, must inform the parties to the Convention.Defined as warships displacing more than 100 tons but not above 10,000 tons. In wartime, if Turkey is not involved in the conflict, warships of the nations at war may not pass through the Straits, except when returning to their base. When Turkey is at war, or feels threatened by a war, it may take any decision about the passage of warships as it sees fit. While it was designed for a particular geopolitical context, and remains unchanged since its adoption, the Montreux Convention has endured as a "solid example of a rules-based international order", since most of its terms are still followed.


Background

The convention was one of a series of agreements in the 19th and 20th centuries that sought to address the long-running Straits Question of who should control the strategically vital link between the Black Sea and
Mediterranean Sea The Mediterranean Sea is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean Basin and almost completely enclosed by land: on the north by Western and Southern Europe and Anatolia, on the south by North Africa, and on the e ...
. In 1923, the
Treaty of Lausanne The Treaty of Lausanne (french: Traité de Lausanne) was a peace treaty negotiated during the Lausanne Conference of 1922–23 and signed in the Palais de Rumine, Lausanne, Switzerland, on 24 July 1923. The treaty officially settled the confl ...
had demilitarised the Dardanelles and opened the Straits to unrestricted civilian and military traffic under the supervision of the International Straits Commission of the
League of Nations The League of Nations (french: link=no, Société des Nations ) was the first worldwide intergovernmental organisation whose principal mission was to maintain world peace. It was founded on 10 January 1920 by the Paris Peace Conference that ...
. By the late 1930s, the strategic situation in the Mediterranean had altered with the rise of Fascist Italy, which controlled the Greek-inhabited
Dodecanese The Dodecanese (, ; el, Δωδεκάνησα, ''Dodekánisa'' , ) are a group of 15 larger plus 150 smaller Greek islands in the southeastern Aegean Sea and Eastern Mediterranean, off the coast of Turkey's Anatolia, of which 26 are inhabited. ...
islands off the west coast of Turkey and had constructed fortifications on
Rhodes Rhodes (; el, Ρόδος , translit=Ródos ) is the largest and the historical capital of the Dodecanese islands of Greece. Administratively, the island forms a separate municipality within the Rhodes (regional unit), Rhodes regional unit, w ...
,
Leros Leros ( el, Λέρος) is a Greek island and municipality in the Dodecanese in the southern Aegean Sea. It lies (171 nautical miles) from Athens's port of Piraeus, from which it can be reached by an 9-hour ferry ride or by a 45-minute flight fr ...
and
Kos Kos or Cos (; el, Κως ) is a Greek island, part of the Dodecanese island chain in the southeastern Aegean Sea. Kos is the third largest island of the Dodecanese by area, after Rhodes and Karpathos; it has a population of 36,986 (2021 census) ...
. The Turks feared that Italy would seek to exploit access to the Straits to expand its power into Anatolia and the Black Sea region. There were also fears of Bulgarian rearmament.Christos L. Rozakis, Petros N. Stagos, ''The Turkish Straits'', p. 101. Martinus Nijhoff, 1987. Although Turkey was not legally permitted to refortify the Straits, it nonetheless did so secretly. In April 1935, the Turkish government dispatched a lengthy diplomatic note to the signatories of the Treaty of Lausanne proposing a conference to agree a new regime for the Straits and requested that the League of Nations authorise the reconstruction of the Dardanelles forts. In the note, Turkish Foreign Minister Tevfik Rüştü Aras explained that the international situation had changed greatly since 1923. Europe had then been moving towards disarmament and an international guarantee to defend the Straits. The
Abyssinia Crisis The Abyssinia Crisis (; ) was an international crisis in 1935 that originated in what was called the Walwal incident during the ongoing conflict between the Kingdom of Italy and the Empire of Ethiopia (then commonly known as "Abyssinia"). The Lea ...
of 1934–1935, the denunciation by Germany of the
Treaty of Versailles The Treaty of Versailles (french: Traité de Versailles; german: Versailler Vertrag, ) was the most important of the peace treaties of World War I. It ended the state of war between Germany and the Allied Powers. It was signed on 28 June ...
and international moves towards rearmament meant that "the only guarantee intended to guard against the total insecurity of the Straits has just disappeared in its turn". Indeed, Aras said that "the Powers most closely concerned are proclaiming the existence of a threat of general conflagration". The key weaknesses of the present regime were that the machinery for collective guarantees were too slow and ineffective, and there was no contingency for a general threat of war and no provision for Turkey to defend itself. Turkey was therefore prepared to enter into negotiations with a view to arriving in the near future at the conclusion of agreements for regulations of the regime of the Straits under the conditions of security which are indispensable for the inviolability of Turkey's territory, in most liberal spirit, for the constant development of commercial navigation between the Mediterranean and the Black Sea. The response to the note was generally favourable; Australia,
Bulgaria Bulgaria (; bg, България, Bǎlgariya), officially the Republic of Bulgaria,, ) is a country in Southeast Europe. It is situated on the eastern flank of the Balkans, and is bordered by Romania to the north, Serbia and North Maced ...
, France, Germany,
Greece Greece,, or , romanized: ', officially the Hellenic Republic, is a country in Southeast Europe. It is situated on the southern tip of the Balkans, and is located at the crossroads of Europe, Asia, and Africa. Greece shares land borders with ...
,
Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...
,
Romania Romania ( ; ro, România ) is a country located at the crossroads of Central, Eastern, and Southeastern Europe. It borders Bulgaria to the south, Ukraine to the north, Hungary to the west, Serbia to the southwest, Moldova to the east, and ...
, the
Soviet Union The Soviet Union,. officially the Union of Soviet Socialist Republics. (USSR),. was a transcontinental country that spanned much of Eurasia from 1922 to 1991. A flagship communist state, it was nominally a federal union of fifteen nationa ...
,
Turkey Turkey ( tr, Türkiye ), officially the Republic of Türkiye ( tr, Türkiye Cumhuriyeti, links=no ), is a transcontinental country located mainly on the Anatolian Peninsula in Western Asia, with a small portion on the Balkan Peninsula in ...
, the
United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and Nor ...
and
Yugoslavia Yugoslavia (; sh-Latn-Cyrl, separator=" / ", Jugoslavija, Југославија ; sl, Jugoslavija ; mk, Југославија ;; rup, Iugoslavia; hu, Jugoszlávia; rue, label=Pannonian Rusyn, Югославия, translit=Juhoslavija ...
attended negotiations at
Montreux Montreux (, , ; frp, Montrolx) is a Swiss municipality and town on the shoreline of Lake Geneva at the foot of the Alps. It belongs to the district of Riviera-Pays-d'Enhaut in the canton of Vaud in Switzerland, and has a population of approximat ...
,
Switzerland ). Swiss law does not designate a ''capital'' as such, but the federal parliament and government are installed in Bern, while other federal institutions, such as the federal courts, are in other cities (Bellinzona, Lausanne, Luzern, Neuchâtel ...
, which began on 22 June 1936. Two major powers were notably absent: Italy, whose aggressively expansionist policies had prompted the conference, refused to attend, and the increasingly isolationist
United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territo ...
declined even to send an observer.Christos L. Rozakis, Petros N. Stagos, ''The Turkish Straits'', p. 123. Martinus Nijhoff Publishers, 1987. Turkey, the United Kingdom and the Soviet Union each put forward their own set of proposals, each aimed chiefly at protecting the proponent's own interests. The British favoured the continuation of a relatively restrictive approach, the Turks sought a more liberal regime that reasserted their control over the Straits and the Soviets proposed a regime that would guarantee absolute freedom of passage. The British, supported by France, sought to exclude the Soviet fleet from the
Mediterranean Sea The Mediterranean Sea is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean Basin and almost completely enclosed by land: on the north by Western and Southern Europe and Anatolia, on the south by North Africa, and on the e ...
, where it might threaten the vital shipping lanes to
India India, officially the Republic of India (Hindi: ), is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world. Bounded by the Indian Ocean on the so ...
,
Egypt Egypt ( ar, مصر , ), officially the Arab Republic of Egypt, is a List of transcontinental countries, transcontinental country spanning the North Africa, northeast corner of Africa and Western Asia, southwest corner of Asia via a land bridg ...
and the
Far East The ''Far East'' was a European term to refer to the geographical regions that includes East and Southeast Asia as well as the Russian Far East to a lesser extent. South Asia is sometimes also included for economic and cultural reasons. The ter ...
. In the end, the British conceded some of their requests, but the Soviets succeeded in ensuring that the Black Sea countries, including the Soviet Union, were given exemptions from the military restrictions imposed on non-Black Sea nations. The agreement was ratified by all of the conference attendees with the exception of Germany, which had not been a signatory to the Treaty of Lausanne, and with reservations by Japan, and came into force on 9 November 1936; it was registered with the '' League of Nations Treaty Series'' on 11 December 1936. Britain's willingness to make concessions has been attributed to a desire to avoid Turkey being driven to ally itself with or to fall under the influence of
Adolf Hitler Adolf Hitler (; 20 April 188930 April 1945) was an Austrian-born German politician who was dictator of Germany from 1933 until his death in 1945. He rose to power as the leader of the Nazi Party, becoming the chancellor in 1933 and then ...
or
Benito Mussolini Benito Amilcare Andrea Mussolini (; 29 July 188328 April 1945) was an Italian politician and journalist who founded and led the National Fascist Party. He was Prime Minister of Italy from the March on Rome in 1922 until his deposition in 194 ...
.Dilek Barlas, ''Etatism and Diplomacy in Turkey'', pp. 166–170. BRILL, 1998. It was thus the first in a series of steps by Britain and France to ensure that Turkey would either remain neutral or tilt towards the Western Allies in the event of any future conflict with the Axis.


Terms

As mentioned in its preamble, the Convention replaced the terms of the Lausanne Treaty of 1923 as regards the Straits. This had dictated the demilitarisation of the
Greek Greek may refer to: Greece Anything of, from, or related to Greece, a country in Southern Europe: *Greeks, an ethnic group. *Greek language, a branch of the Indo-European language family. **Proto-Greek language, the assumed last common ancestor ...
islands of
Lemnos Lemnos or Limnos ( el, Λήμνος; grc, Λῆμνος) is a Greek island in the northern Aegean Sea. Administratively the island forms a separate municipality within the Lemnos regional unit, which is part of the North Aegean region. The p ...
and
Samothrace Samothrace (also known as Samothraki, el, Σαμοθράκη, ) is a Greek island in the northern Aegean Sea. It is a municipality within the Evros regional unit of Thrace. The island is long and is in size and has a population of 2,859 (2011 ...
, along with the demilitarisation of the
Dardanelles The Dardanelles (; tr, Çanakkale Boğazı, lit=Strait of Çanakkale, el, Δαρδανέλλια, translit=Dardanéllia), also known as the Strait of Gallipoli from the Gallipoli peninsula or from Classical Antiquity as the Hellespont (; ...
, the
Sea of Marmara The Sea of Marmara,; grc, Προποντίς, Προποντίδα, Propontís, Propontída also known as the Marmara Sea, is an inland sea located entirely within the borders of Turkey. It connects the Black Sea to the Aegean Sea via the B ...
and the
Bosporus The Bosporus Strait (; grc, Βόσπορος ; tr, İstanbul Boğazı 'Istanbul strait', colloquially ''Boğaz'') or Bosphorus Strait is a natural strait and an internationally significant waterway located in Istanbul in northwestern Tu ...
, and the Turkish islands of İmroz, Bozcaada and Tavşan. The Convention consists of 29 Articles, four annexes and one protocol. Articles 2–7 consider the passage of merchant ships. Articles 8–22 consider the passage of war vessels. The key principle of freedom of passage and navigation is laid out in articles 1 and 2. Article 1 provides, "The High Contracting Parties recognise and affirm the principle of freedom of passage and navigation by sea in the Straits". Article 2 states, "In time of peace, merchant vessels shall enjoy complete freedom of passage and navigation in the Straits, by day and by night, under any flag with any kind of cargo". The International Straits Commission was abolished, thereby allowing the full resumption of Turkish military control over the Straits and the refortification of the Dardanelles. Turkey was authorised to close the Straits to all foreign warships during a war or when it was threatened by aggression. Also, Turkey was authorised to refuse transit from merchant ships belonging to countries at war with it. A number of highly specific restrictions in Article 14 and 18 were imposed on what type of warships are allowed passage. Non-Black Sea powers wishing to send a vessel must notify Turkey 15 days prior to the requested passing, and Black Sea states must notify 8 days prior to passage. Also, no more than nine foreign warships, with a total aggregate tonnage of 15,000 tons, may pass at any one time. Furthermore, no single ship heavier than 10,000 tonnes can pass. An aggregate tonnage of all non-Black Sea warships in the Black Sea must be no more than 45,000 tons, with no one nation exceeding 30,000 tons at any given time, and they are permitted to stay in the Black Sea for at most 21 days. Only Black Sea states may transit
capital ship The capital ships of a navy are its most important warships; they are generally the larger ships when compared to other warships in their respective fleet. A capital ship is generally a leading or a primary ship in a naval fleet. Strategic im ...
s of any tonnage, escorted by no more than two destroyers. Any revision to articles 14 and 18 requires 3/4 majority of signatory countries and must include Turkey. Under Article 12, Black Sea states are also allowed to send submarines through the Straits with prior notice as long as the vessels have been constructed, purchased or sent for repair outside the Black Sea. The less restrictive rules applicable to Black Sea states were agreed as effectively a concession to the Soviet Union, the only Black Sea state other than Turkey with any significant number of capital ships or submarines.Robin Rolf Churchill, Alan Vaughan Lowe, ''The law of the sea'', p. 115. Manchester University Press, 1999. The passage of civil aircraft between the Mediterranean and the Black seas is permitted only along routes authorised by the Turkish government.Jozef Goldblat, ''Arms control: the new guide to negotiations and agreements'', pp. 175–177. In time of war, Turkey not being belligerent, warships of belligerent Powers shall not pass, except i.a. to return to their base. (art. 19)


Implementation

The terms of the Convention were largely a reflection of the international situation in the mid-1930s. They largely served Turkish and Soviet interests by enabling Turkey to regain military control of the Straits and assuring Soviet dominance of the Black Sea. Although the Convention restricted the Soviets' ability to send naval forces into the Mediterranean Sea, which satisfied British concerns about Soviet intrusion into what was considered a British sphere of influence, it also ensured that outside powers could not exploit the Straits to threaten the Soviet Union. That was to have significant repercussions during World War II when the Montreux regime prevented the
Axis powers The Axis powers, ; it, Potenze dell'Asse ; ja, 枢軸国 ''Sūjikukoku'', group=nb originally called the Rome–Berlin Axis, was a military coalition that initiated World War II and fought against the Allies. Its principal members were N ...
from sending naval forces through the Straits to attack the Soviet Union. The Axis powers were thus severely limited in naval capability in their Black Sea campaigns and relied principally on small vessels that had been transported overland by rail and canal networks. Auxiliary vessels and armed merchant ships occupied a grey area, however, and the transit of such vessels through the straits led to friction between the Allies and Turkey. Repeated protests from Moscow and London led to the Turkish government banning the movements of "suspicious" Axis ships with effect from June 1944 after a number of German auxiliary ships had been permitted to transit the Straits.


Aircraft carriers

Although the Montreux Convention is cited by the Turkish government as prohibiting aircraft carriers from transiting the Straits, the treaty actually contains no explicit prohibition on aircraft carriers. However, modern aircraft carriers are heavier than the 15,000-ton limit imposed on warships, which makes it impossible for non-Black Sea powers to transit modern aircraft carriers through the Straits. Under Article 11, Black Sea states are permitted to transit
capital ship The capital ships of a navy are its most important warships; they are generally the larger ships when compared to other warships in their respective fleet. A capital ship is generally a leading or a primary ship in a naval fleet. Strategic im ...
s of any tonnage through the straits, but Annex II specifically excludes aircraft carriers from the definition of capital ship. In 1936, it was common for battleships to carry
observation aircraft A surveillance aircraft is an aircraft used for surveillance. They are operated by military forces and other government agencies in roles such as intelligence gathering, battlefield surveillance, airspace surveillance, reconnaissance, observat ...
. Therefore, aircraft carriers were defined as ships that were "designed or adapted primarily for the purpose of carrying and operating aircraft at sea". The inclusion of aircraft on any other ship does not classify it as an aircraft carrier. The Soviet Union designated its ''Kiev''-class and ''Kuznetsov''-class ships as " aircraft-carrying cruisers" because the ships were armed with P-500 and P-700 cruise missiles, which also form the main armament of the ''Slava''-class cruiser and the ''Kirov''-class battlecruiser. The result was that the Soviet Navy could send its aircraft-carrying cruisers through the Straits in compliance with the Convention, but at the same time, the Convention denied access to NATO aircraft carriers, which exceeded the 15,000-ton limit. While the Soviet Union built its aircraft-carrying cruisers in the Black Sea, neither the Soviet Union nor Russia has ever based them in the Black Sea. Turkey chose to accept the designation of the Soviet aircraft carrying cruisers as aircraft cruisers, as any revision of the Convention could leave Turkey with less control over the Straits, and the
UN Convention on the Law of the Sea The United Nations Convention on the Law of the Sea (UNCLOS), also called the Law of the Sea Convention or the Law of the Sea Treaty, is an international agreement that establishes a legal framework for all marine and maritime activities. , 167 c ...
had already established a more liberal passage through other straits. By allowing the Soviet aircraft-carrying cruisers to transit the Straits, Turkey could leave the more restrictive Montreux Convention in place.


Controversies


Istanbul Canal

If it comes to fruition, the long-proposed Kanal Istanbul (Istanbul Canal) project could circumvent the Montreux Convention in the 21st century and allow greater Turkish autonomy with respect to the passage of military ships, which are limited in number, tonnage, and weaponry, from the Black Sea to the
Sea of Marmara The Sea of Marmara,; grc, Προποντίς, Προποντίδα, Propontís, Propontída also known as the Marmara Sea, is an inland sea located entirely within the borders of Turkey. It connects the Black Sea to the Aegean Sea via the B ...
. The canal project would involve building a artificial waterway through
Thrace Thrace (; el, Θράκη, Thráki; bg, Тракия, Trakiya; tr, Trakya) or Thrake is a geographical and historical region in Southeast Europe, now split among Bulgaria, Greece, and Turkey, which is bounded by the Balkan Mountains to th ...
to connect the
Sea of Marmara The Sea of Marmara,; grc, Προποντίς, Προποντίδα, Propontís, Propontída also known as the Marmara Sea, is an inland sea located entirely within the borders of Turkey. It connects the Black Sea to the Aegean Sea via the B ...
with the Black Sea.“Erdogan's Dream, Istanbul's Nightmare“, en.qantara.de/content/the-istanbul-canal-project-erdogans-dream-istanbuls-nightmare Retrieved December 27, 2020. That route would run nearly parallel to the Bosporus, but ships transiting it would arguably not be subject to the terms of the Montreux Convention. Currently, the Dardanelles is heavily congested with shipping and there are long waits to pass through the Bosporus. The Kanal project's stated purposes are to speed up shipping and boost revenue by providing an alternate maritime route. In January 2018, the Turkish Prime Minister and a former Transport Minister, Binali Yıldırım, announced that the Kanal would not be subject to the terms of the Montreux Convention. That announcement was received negatively by the Russian media and government, and many have disputed the Turkish government's interpretation of the convention'.


Soviet Union

The Convention was repeatedly challenged by the Soviet Union during World War II and the Cold War. As early as 1939,
Joseph Stalin Joseph Vissarionovich Stalin (born Ioseb Besarionis dze Jughashvili; – 5 March 1953) was a Georgian revolutionary and Soviet Union, Soviet political leader who led the Soviet Union from 1924 until his death in 1953. He held power as Ge ...
sought to reopen the Straits Question and proposed joint Turkish and Soviet control of the Straits, complaining that "a small state urkeysupported by Great Britain held a great state by the throat and gave it no outlet". After the
Molotov–Ribbentrop Pact , long_name = Treaty of Non-Aggression between Germany and the Union of Soviet Socialist Republics , image = Bundesarchiv Bild 183-H27337, Moskau, Stalin und Ribbentrop im Kreml.jpg , image_width = 200 , caption = Stalin and Ribbentrop shaking ...
was signed by the Soviet Union and
Nazi Germany Nazi Germany (lit. "National Socialist State"), ' (lit. "Nazi State") for short; also ' (lit. "National Socialist Germany") (officially known as the German Reich from 1933 until 1943, and the Greater German Reich from 1943 to 1945) was ...
, Soviet Foreign Minister
Vyacheslav Molotov Vyacheslav Mikhaylovich Molotov. ; (;. 9 March Old_Style_and_New_Style_dates">O._S._25_February.html" ;"title="Old_Style_and_New_Style_dates.html" ;"title="nowiki/>Old Style and New Style dates">O. S. 25 February">Old_Style_and_New_Style_dat ...
informed his German counterparts that the Soviet Union wished to take military control of the Straits and to establish its own military base there. The Soviets returned to the issue in 1945 and 1946, demanding a revision of the Montreux Convention at a conference excluding most of its signatories; their demands included a permanent Soviet military presence and joint control of the Straits. These demands were firmly rejected by Turkey, despite an ongoing Soviet "strategy of tension". For several years after World War II, the Soviets exploited the restriction on the number of foreign warships by ensuring that one of theirs was always in the Straits, thus effectively blocking any state other than Turkey from sending warships through the Straits. Soviet pressure expanded into a full demand to revise the Montreux Convention, which led to the 1946 Turkish Straits crisis and Turkey abandoning its policy of neutrality. In 1947, Turkey became the recipient of US military and economic assistance under the
Truman Doctrine The Truman Doctrine is an American foreign policy that pledged American "support for democracies against authoritarian threats." The doctrine originated with the primary goal of containing Soviet geopolitical expansion during the Cold War. It wa ...
of
containment Containment was a geopolitical strategic foreign policy pursued by the United States during the Cold War to prevent the spread of communism after the end of World War II. The name was loosely related to the term '' cordon sanitaire'', which ...
and joined
NATO The North Atlantic Treaty Organization (NATO, ; french: Organisation du traité de l'Atlantique nord, ), also called the North Atlantic Alliance, is an intergovernmental military alliance between 30 member states – 28 European and two Nor ...
along with Greece, in 1952.


United States

The United States has not signed the convention but has generally complied with it. The passage of US warships through the Straits has also raised controversy, as the convention forbids the transit of non-Black Sea nations' warships with guns of a
calibre In guns, particularly firearms, caliber (or calibre; sometimes abbreviated as "cal") is the specified nominal internal diameter of the gun barrel bore – regardless of how or where the bore is measured and whether the finished bore match ...
larger than eight inches (203 mm). In the 1960s, the US sent warships carrying 420 mm calibre
ASROC The RUR-5 ASROC (for "Anti-Submarine Rocket") is an all-weather, all sea-conditions anti-submarine missile system. Developed by the United States Navy in the 1950s, it was deployed in the 1960s, updated in the 1990s, and eventually installed ...
missiles through the Straits, prompting Soviet protests. The Turkish government rejected Soviet complaints, pointing out that guided missiles were not guns and that, since such weapons had not existed at the time of the Convention, they were not restricted. According to Jason Ditz of
Antiwar.com Antiwar.com is a website that describes itself as devoted to non-interventionism and as opposing imperialism and war. It is a project of the Randolph Bourne Institute. The website states that it is "fighting the next information war”. History ...
, the Montreux Convention is an obstacle to a US naval buildup in the Black Sea because of the stipulations regulating warship traffic by nations not sharing a Black Sea coastline. The US thinktank
Stratfor Strategic Forecasting Inc., commonly known as Stratfor, is an American geopolitics publisher and consultancy founded in 1996. Stratfor's business model is to provide individual and enterprise subscriptions to Stratfor Worldview, its online public ...
has suggested that those stipulations place Turkey's relationship to the US and its obligations as a NATO member in conflict with Russia and the regulations of the Montreux Convention.


Militarisation of Greek islands

The Convention annulled the terms of the earlier Lausanne Treaty on the Straits, including the demilitarisation of the
Greek Greek may refer to: Greece Anything of, from, or related to Greece, a country in Southern Europe: *Greeks, an ethnic group. *Greek language, a branch of the Indo-European language family. **Proto-Greek language, the assumed last common ancestor ...
islands of
Lemnos Lemnos or Limnos ( el, Λήμνος; grc, Λῆμνος) is a Greek island in the northern Aegean Sea. Administratively the island forms a separate municipality within the Lemnos regional unit, which is part of the North Aegean region. The p ...
and
Samothrace Samothrace (also known as Samothraki, el, Σαμοθράκη, ) is a Greek island in the northern Aegean Sea. It is a municipality within the Evros regional unit of Thrace. The island is long and is in size and has a population of 2,859 (2011 ...
. Turkey recognised Greece's right to militarise them via a letter sent to the Greek Prime Minister on 6 May 1936 by the Turkish Ambassador in Athens, Ruşen Eşref. The Turkish government reiterated this position when the Turkish Minister for Foreign Affairs, Rüştu Aras, in his address to the Turkish National Assembly on the occasion of the ratification of the Montreux Treaty, recognised Greece's legal right to deploy troops on Lemnos and Samothrace with the following statement: "The provisions pertaining to the islands of Lemnos and Samothrace, which belong to our neighbour and friendly country Greece and were demilitarised in application of the 1923 Lausanne Treaty, were also abolished by the new Montreux Treaty, which gives us great pleasure". As the relationship between Greece and Turkey deteriorated over the following decades, Turkey denied that the treaty affected the Greek islands and sought to bring back into force the relevant part of the Lausanne Treaty on the Straits.


1994 reforms

The
United Nations Convention on the Law of the Sea The United Nations Convention on the Law of the Sea (UNCLOS), also called the Law of the Sea Convention or the Law of the Sea Treaty, is an international agreement that establishes a legal framework for all marine and maritime activities. , 167 c ...
(UNCLOS), which entered into force in November 1994, has prompted calls for the Montreux Convention to be revised and adapted to make it compatible with UNCLOS's regime governing straits used for international navigation. However, Turkey's longstanding refusal to sign UNCLOS has meant that Montreux remains in force without further amendments. The safety of vessels passing through the Bosporus has become more of a concern in recent years as the volume of traffic has increased greatly since the Convention was signed: from 4,500 ships passing through in 1934 to 49,304 by 1998. As well as the obvious environmental concerns, the Straits bisect the city of
Istanbul ) , postal_code_type = Postal code , postal_code = 34000 to 34990 , area_code = +90 212 (European side) +90 216 (Asian side) , registration_plate = 34 , blank_name_sec2 = GeoTLD , blank_in ...
, with over 14 million people living on its shores, and so maritime incidents in the Straits pose a considerable risk to public safety. The Convention does not, however, make any provision for the regulation of shipping for the purposes of safety or environmental protection. In January 1994, the Turkish government adopted new "Maritime Traffic Regulations for the Turkish Straits and the Marmara Region" to introduce a new regulatory regime "to ensure the safety of navigation, life and property and to protect the environment in the region" but without violating the Montreux principle of free passage. The new regulations provoked controversy when Russia, Greece, Cyprus,
Romania Romania ( ; ro, România ) is a country located at the crossroads of Central, Eastern, and Southeastern Europe. It borders Bulgaria to the south, Ukraine to the north, Hungary to the west, Serbia to the southwest, Moldova to the east, and ...
, Ukraine and
Bulgaria Bulgaria (; bg, България, Bǎlgariya), officially the Republic of Bulgaria,, ) is a country in Southeast Europe. It is situated on the eastern flank of the Balkans, and is bordered by Romania to the north, Serbia and North Maced ...
raised objections. However, they were approved by the International Maritime Organisation on the grounds that they were not intended to prejudice "the rights of any ship using the Straits under international law". The regulations were revised in November 1998 to address Russian concerns.


Russo-Ukrainian War

After the
Russian invasion of Ukraine On 24 February 2022, in a major escalation of the Russo-Ukrainian War, which began in 2014. The invasion has resulted in tens of thousands of deaths on both sides. It has caused Europe's largest refugee crisis since World War II. An ...
on 24 February 2022, the Ukrainian government appealed to Turkey to exercise its authority under the Montreux Convention to limit the transit of Russian warships from the Mediterranean to the Black Sea. At least six Russian warships and a submarine had crossed the Turkish straits in February. After initial reluctance, attributed to the country's close ties with both Russia and Ukraine, Turkish Foreign Minister
Mevlüt Çavuşoğlu Mevlüt Çavuşoğlu (; born 5 February 1968) is a Turkish diplomat and politician who has served as Minister of Foreign Affairs of Turkey since 24 November 2015. He previously served in the same position from August 2014 to August 2015. He is ...
announced on 27 February that his government would legally recognise the Russian invasion as a "war", which provides grounds for implementing the Convention with respect to military vessels. This blockage of naval vessels also applies to NATO powers who cannot now move their vessels from the Mediterranean to the Black Sea. However, Çavuşoğlu reiterated that pursuant to the terms of the agreement, Turkey cannot block Russian warships based in the Black Sea from returning to their registered base. Around February 27–28, Turkey refused permission for three out of four Russian warships to enter the Black Sea as their home base was not on the Black Sea. Up until 2022, Russia had deployed its ''Kilo''-class submarines from the Black Sea to the Mediterranean, arguing that these vessels were ultimately destined for "maintenance" at facilities in the Baltic Sea. There was criticism of this since the submarines would then remain deployed in the Mediterranean for an extensive period of time. Since this was becoming more difficult to justify, one analysis in May 2022 suggested that the Russians may have found a work-around to the problem, potentially using the country's internal waterways to permit transit to vessels up to the size of the ''Kilo''-class boats between the Black Sea and the Baltic. The right to use the internal waterways to facilitate such a transit has yet to be confirmed. In October 2022, two Russian Federation ships, that had been refused permission for nine months, the missile cruiser Varyag, the flagship of the Russian Pacific Fleet, and Admiral Tributs, a large anti-submarine destroyer, left the Mediterranean Sea through the Suez Canal.


Notes


References


Sources

* * * * * {{Authority control Water transport in Turkey History of the Republic of Turkey Soviet Union–Turkey relations Soviet Union–United Kingdom relations Law of the sea treaties History of the Mediterranean 1936 in Turkey Treaties concluded in 1936 Treaties entered into force in 1936 Treaties of Turkey Straits of Turkey Treaties of Australia Treaties of the Kingdom of Bulgaria Treaties of the French Third Republic Treaties of the Kingdom of Greece Treaties of the Empire of Japan Treaties of the Soviet Union Treaties of Yugoslavia Treaties of the Kingdom of Romania Treaties of the United Kingdom 1936 in Switzerland League of Nations treaties Diplomatic conferences in Switzerland Turkish Straits History of the Dardanelles Interwar-period treaties July 1936 events