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The Turkish Straits (Turkish: Türk Boğazları) are two internationally significant waterways in northwestern Turkey. The straits create a series of international passages that connect the Aegean and Mediterranean seas to the Black Sea. They consist of the Dardanelles and the Bosphorus. The straits are on opposite ends of the Sea of Marmara. The straits and the Sea of Marmara are part of the sovereign sea territory of Turkey and subject to the regime of internal waters.
Located in the western part of the landmass of Eurasia, the Straits are conventionally considered the boundary between the continents of Europe and Asia, as well as the dividing line between European Turkey and Asian Turkey. Owing to their strategic importance in international commerce, politics, and warfare, the Straits have played a significant role in European and world history. Since 1936, they have been governed in accordance with the Montreux Convention.
As maritime waterways, the Turkish Straits connect various seas along the Eastern Mediterranean, the Balkans, the Near East, and Western Eurasia. Specifically, the Straits allows maritime connections from the Black Sea all the way to the Aegean and Mediterranean Seas, the Atlantic Ocean via Gibraltar, and the Indian Ocean through the Suez Canal, making them crucial international waterways, in particular for the passage of goods coming in from Russia.
The Turkish Straits are made up of the following waterways;
- The Bosphorus (also spelled Bosporus; Turkish: Boğaziçi or İstanbul Boğazı, "Istanbul Strait"), about 30 kilometers (19 mi) long and only 700 meters (2,300 ft) wide, connects the Sea of Marmara with the Black Sea in the north. It runs through the city of Istanbul, making it a city located on two continents. It is crossed by three suspension bridges (the Bosphorus Bridge, the Fatih Sultan Mehmet Bridge and the Yavuz Sultan Selim Bridge), and two underwater tunnels (the Marmaray rail tunnel and the Eurasia road tunnel). There are plans for further crossings being debated at various stages.
- The Dardanelles (Turkish: Çanakkale Boğazı, "Çanakkale Strait"), 68 km (42 mi) long and 1.2 km (0.75 mi) wide, connects the Sea of Marmara with the Mediterranean in the southwest, near the city of Çanakkale. In classical antiquity, the Dardanelles strait was known as the Hellespont. The strait and the Gallipoli (Gelibolu) peninsula on its western shoreline were the scene of the Battle of Gallipoli during the First World War. The Çanakkale 1915 Bridge, currently under construction and set to open in 2022, will be the first crossing of the strait.
The Straits have had major maritime strategic importance at least since Bronze-age armies fought the Trojan War near the Aegean entrance, and the narrow crossings between Asia and Europe have provided migration and invasion routes (for Persians, Galatians, and Turks, for example) for even longer. In the declining days of the Ottoman Empire, the "Straits Question" involved the diplomats of Europe and the Ottomans.
By the terms of the London Straits Convention concluded on July 13, 1841 between the Great Powers of Europe— Russia, the United Kingdom, France, Austria and Prussia, the "ancient rule" of the Ottoman Empire was re-established by closing the Turkish straits to all warships whatsoever, barring those of the Ottoman Sultan's allies during wartime. This treaty became one in a series dealing with access to the Bosphorus, the Sea of Marmara, and the Dardanelles. It evolved from the secret 1833 Treaty of Hünkâr İskelesi (Unkiar Skelessi), in which the Ottoman Empire guaranteed exclusive use of the Straits to "Black Sea Powers" (i.e., Ottoman Empire and Russian Empire) warships in the case of a general war.
The Straits became especially important in the course of World War I (1914-1918) as a potential link between the Entente powers' Eastern and Western Fronts. Anglo-French naval forces failed to take control of the Dardanelles (February - March 1915), but in the secret Straits Agreement diplomacy of March-April 1915, the members of the Triple Entente agreed – in the event of victory in World War I – to cede Ottoman territory controlling and overlooking the Straits to the Russian Empire. Anglo-French troops then launched the Gallipoli campaign, an ultimately unsuccessful operation to take control of the Straits following amphibious landings on the Gallipoli Peninsula (April 1915 to January 1916). The revolutions in Petrograd in 1917 ultimately stalled Russia's own plans to seize the Straits.
The modern treaty controlling access is the 1936 Montreux Convention Regarding the Regime of the Turkish Straits, which remains in force as of 2020[update]. This Convention gives the Republic of Turkey control over warships entering the straits but guarantees the free passage of civilian vessels in peacetime.
- Khan S.. 2013. An Economic Boom in Turkey Takes a Toll on Marine Life. Yale Environment 360. Retrieved on September 06, 2017
- Rozakis & Stagos 1987, pp. 24–25.
- Windchy, Eugene G. (2014). "World War I (1917 to 1918)". Twelve American Wars: Nine of Them Avoidable (2 ed.) (published 2015). p. 283. ISBN 9781491730546. Retrieved 14 August 2020.
[...] Saz[o]nov made plans for a seizure of the Turkish straits.
McMeekin, Sean (2013). July 1914: Countdown to War. London: Icon Books Ltd. ISBN 9781848316096. Retrieved 14 August 2020.
[...] Sazonov, Sukhomlinov, and Grigorevich had drawn up a detailed plan for readying Russia to seize Constantinople and the Ottoman Straits in case of war. The plan covered [...] the acceleration of the mobilisation timetable, which would see the first day troops could be put ashore at the Bosporus speeded up from Mobilisation Day (M) + 10 to M + 5 [...]. [...] After learning the news from Sarajevo, Sazonov [...] wanted to know whether, in accordance with measures ordered in February , the first Russian troops would now be able to land in the Bosphorus within 'four or five days' of mobilisation. [...] Sazonov was preparing for a European war, in which Russia's key strategic objective was to seize Constantinople and the Straits.
- Gerolymatos, André (2014). "The Turkish Straits: History, Politics and Strategic Dilemmas". Ocean Yearbook. 28: 58–79. doi:10.1163/22116001-02801003.
- Rozakis, Christos L.; Stagos, Petros N. (1987). The Turkish Straits. Martinus Nijhoff Publishers. ISBN 90-247-3464-9.
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