The Greco-Turkish War of 1897 or the Ottoman-Greek War of 1897 ( or ), also called the Thirty Days' War and known in
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 ...
as the Black '97 (, ''Mauro '97'') or the Unfortunate War ( el, Ατυχής πόλεμος, Atychis polemos), was a war fought between the
Kingdom of Greece
The Kingdom of Greece ( grc, label= Greek, Βασίλειον τῆς Ἑλλάδος ) was established in 1832 and was the successor state to the First Hellenic Republic. It was internationally recognised by the Treaty of Constantinople, wh ...
and the
Ottoman Empire
The Ottoman Empire, * ; is an archaic version. The definite article forms and were synonymous * and el, Оθωμανική Αυτοκρατορία, Othōmanikē Avtokratoria, label=none * info page on book at Martin Luther University) ...
. Its immediate cause involved the status of the
Ottoman province of Crete, whose Greek-majority population had long desired union with Greece. Despite the Ottoman victory on the field, an autonomous
Cretan State
The Cretan State ( el, Κρητική Πολιτεία, Kritiki Politeia; ota, كريد دولتى, Girid Devleti) was established in 1898, following the intervention by the Great Powers (United Kingdom, France, Italy, Austria-Hungary, Germany ...
under Ottoman
suzerainty was established the following year (as a result of the intervention of the
Great Powers after the war), with
Prince George of Greece and Denmark
Prince George of Greece and Denmark ( el, Γεώργιος; 24 June 1869 – 25 November 1957) was the second son and child of George I of Greece and Olga Konstantinovna of Russia, and is remembered chiefly for having once saved the life of hi ...
as its first
High Commissioner.
The war put the military and political personnel of Greece to test in an official open war for the first time since the
Greek War of Independence in 1821. For the Ottoman Empire, this was also the first war-effort to test a re-organized military system. The
Ottoman army
The military of the Ottoman Empire ( tr, Osmanlı İmparatorluğu'nun silahlı kuvvetleri) was the armed forces of the Ottoman Empire.
Army
The military of the Ottoman Empire can be divided in five main periods. The foundation era covers the ...
operated under the guidance of a German
military mission
A military operation is the coordinated military actions of a state, or a non-state actor, in response to a developing situation. These actions are designed as a military plan to resolve the situation in the state or actor's favor. Operations ma ...
led (1883–1895) by
Colmar Freiherr von der Goltz
Wilhelm Leopold Colmar Freiherr von der Goltz (12 August 1843 – 19 April 1916), also known as ''Goltz Pasha'', was a Prussian Field Marshal and military writer.
Military career
Goltz was born in , East Prussia (later renamed Goltzhausen; now ...
, who had reorganized the Ottoman military after its defeat in the
Russo-Turkish War of 1877–1878.
The conflict proved that Greece was wholly unprepared for war. Plans, fortifications and weapons were non-existent, the mass of the officer corps was unsuited to its tasks, and training was inadequate. As a result, the numerically superior, better-organized, -equipped and -led Ottoman forces, heavily composed of Albanian warriors with combat experience, pushed the Greek forces south out of
Thessaly
Thessaly ( el, Θεσσαλία, translit=Thessalía, ; ancient Thessalian: , ) is a traditional geographic and modern administrative region of Greece, comprising most of the ancient region of the same name. Before the Greek Dark Ages, The ...
and threatened Athens,
only to cease fire when the Great Powers persuaded the Sultan to agree to an armistice.
Background
In 1878 the Ottoman Empire, according to the provisions of the
Congress of Berlin
The Congress of Berlin (13 June – 13 July 1878) was a diplomatic conference to reorganise the states in the Balkan Peninsula after the Russo-Turkish War of 1877–78, which had been won by Russia against the Ottoman Empire. Represented at th ...
, signed the
Pact of Halepa
The Pact of Halepa ( el, Σύμβαση της Χαλέπας) or Halepa Charter (Χάρτης της Χαλέπας) was an agreement made in 1878 between the Ottoman Empire (then ruled by the Sultan Abdul Hamid II) and the representatives of the ...
which entailed the implementation of the organic law of 1868, promised but never implemented by the Ottoman government, which was to give Crete a status of wide-ranging autonomy. The Ottoman commissioners, however, repeatedly ignored the convention, causing three successive rebellions in 1885, 1888 and 1889. In 1894 Sultan
Abdul Hamid II re-appointed
Alexander Karatheodori Pasha
Alexander Karatheodori Pasha ( el, Αλέξανδρος Καραθεοδωρής; 1833–1906) was an Ottoman Greek statesman and diplomat. He was involved in diplomatic affairs following the aftermath of the Russo-Turkish War of 1877–78.
...
as governor of Crete, but Karatheodori's zeal for the implementation of the agreement was met with fury by the
Muslim population
Adherents of Islam constitute the world's second largest religious group. According to an estimation in 2022, Islam has 1.97 billion adherents, making up about 25% of the world population. A projection by the PEW suggests that Muslims numbe ...
of the island and led to renewed clashes between the Greek and Muslim communities there in 1896.
To quell the unrest, Ottoman military reinforcements arrived while Greek volunteers landed on the island to support the Greek population. At the same time the fleets of the Great Powers patrolled the Cretan waters, leading to further escalation. Nevertheless, an agreement was reached with the Sultan and the tensions receded. In January 1897 inter-communal violence broke out as both sides tried to consolidate their grip on power. The Christian district of
Chania
Chania ( el, Χανιά ; vec, La Canea), also spelled Hania, is a city in Greece and the capital of the Chania regional unit. It lies along the north west coast of the island Crete, about west of Rethymno and west of Heraklion.
The muni ...
was set on fire and many fled to the foreign fleet anchored outside the city. A
struggle
Struggle may refer to:
Film and TV
* ''Struggle'' (2003 film), an Austrian film
* Struggle (2013 film)
* ''Struggle'' (TV series), 2007 Chinese TV series
Music
* ''Struggle'' (Nonpoint album), 1999 release
* Struggle (Woody Guthrie album), 1 ...
for independence and union with Greece was declared by Cretan revolutionaries.
Greek Prime Minister
Theodoros Deligiannis
Theodoros Deligiannis () was a Greek politician, minister and member of the Greek Parliament, who served as Prime Minister of Greece five times from 1885 to 1905.
He led the Nationalist Party, which, alongside the New Party led by his prima ...
was subjected to fierce criticism by his adversary
Dimitrios Rallis
Dimitrios Rallis (Greek: Δημήτριος Ράλλης; 1844–1921) was a Greek politician.
He was born in Athens in 1844. He was descended from an old Greek political family. Before Greek independence, his grandfather, Alexander Rallis, ...
over his alleged inability to handle the issue. Continuous demonstrations in
Athens
Athens ( ; el, Αθήνα, Athína ; grc, Ἀθῆναι, Athênai (pl.) ) is both the capital and largest city of Greece. With a population close to four million, it is also the seventh largest city in the European Union. Athens dominates ...
accused King
George I George I or 1 may refer to:
People
* Patriarch George I of Alexandria (fl. 621–631)
* George I of Constantinople (d. 686)
* George I of Antioch (d. 790)
* George I of Abkhazia (ruled 872/3–878/9)
* George I of Georgia (d. 1027)
* Yuri Dolgor ...
and the government of betrayal of the Cretan cause. The
National Society, a nationalistic, militaristic organisation that had infiltrated all levels of the army and bureaucracy, pushed for immediate confrontation with the Ottomans.
Prelude to war
On 6 February 1897 (according to the modern
Gregorian calendar
The Gregorian calendar is the calendar used in most parts of the world. It was introduced in October 1582 by Pope Gregory XIII as a modification of, and replacement for, the Julian calendar. The principal change was to space leap years dif ...
; it was 25 January 1897 according to the
Julian calendar
The Julian calendar, proposed by Roman consul Julius Caesar in 46 BC, was a reform of the Roman calendar. It took effect on , by edict. It was designed with the aid of Greek mathematicians and astronomers such as Sosigenes of Alexandr ...
then in use in Greece and the Ottoman Empire, which was 12 days behind the Gregorian during the 19th century) the first troopships, accompanied by the battleship ''
Hydra'', sailed for Crete. Before they arrived, a small Greek Navy squadron under the command of
Prince George of Greece and Denmark
Prince George of Greece and Denmark ( el, Γεώργιος; 24 June 1869 – 25 November 1957) was the second son and child of George I of Greece and Olga Konstantinovna of Russia, and is remembered chiefly for having once saved the life of hi ...
appeared off Crete on the 12 February (31 January Julian) with orders to support the Cretan insurgents and harass Ottoman shipping. Six Great Powers (
Austria-Hungary
Austria-Hungary, often referred to as the Austro-Hungarian Empire,, the Dual Monarchy, or Austria, was a constitutional monarchy and great power in Central Europe between 1867 and 1918. It was formed with the Austro-Hungarian Compromise of ...
,
France
France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of overseas regions and territories in the Americas and the Atlantic, Pacific and Indian Oceans. Its metropolitan area ...
, the
German Empire, the
Kingdom of Italy
The Kingdom of Italy ( it, Regno d'Italia) was a state that existed from 1861, when Victor Emmanuel II of Sardinia was proclaimed King of Italy, until 1946, when civil discontent led to an institutional referendum to abandon the monarchy and f ...
, the
Russian Empire
The Russian Empire was an empire and the final period of the Russian monarchy from 1721 to 1917, ruling across large parts of Eurasia. It succeeded the Tsardom of Russia following the Treaty of Nystad, which ended the Great Northern War. ...
, and 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 European mainland, continental mainland. It comprises England, Scotlan ...
) had already deployed warships to Cretan waters to form a naval "
International Squadron" to intervene and to maintain peace on Crete, and they warned Prince George not to engage in hostilities; Prince George's returned to Greece the next day. However, the troopships disembarked two battalions of the Greek Army under
Colonel
Colonel (abbreviated as Col., Col or COL) is a senior military officer rank used in many countries. It is also used in some police forces and paramilitary organizations.
In the 17th, 18th and 19th centuries, a colonel was typically in charge o ...
Timoleon Vassos
Timoleon Vassos or Vasos ( el, Τιμολέων Βάσσος or Βάσος; 1836–1929) was a Hellenic Army officer and general.
He was born in Athens in 1836, the younger son of the hero of the Greek Revolution Vasos Mavrovouniotis. He studied ...
at
Platanias, west of
Chania
Chania ( el, Χανιά ; vec, La Canea), also spelled Hania, is a city in Greece and the capital of the Chania regional unit. It lies along the north west coast of the island Crete, about west of Rethymno and west of Heraklion.
The muni ...
, on the 14 February (2 February on the Julian calendar). Despite the guarantees given by the Great Powers on Ottoman sovereignty over the island, Vassos upon his arrival unilaterally proclaimed its union with Greece. The Powers reacted by demanding that Deligiannis immediately withdraw Greek forces from the island in exchange for a statute of autonomy.
[McTiernan, p. 14.]
The demand was rejected, and so on 19 February (7 February Julian) the first full-scale battle between Greeks and Ottomans occurred, when the Greek expeditionary force in Crete defeated a 4,000-strong Ottoman force at the
Battle of Livadeia. Ordered to keep away from Crete's capital Canea (now
Chania
Chania ( el, Χανιά ; vec, La Canea), also spelled Hania, is a city in Greece and the capital of the Chania regional unit. It lies along the north west coast of the island Crete, about west of Rethymno and west of Heraklion.
The muni ...
), Vassos accomplished little thereafter on Crete, but Cretan insurgents attacked Ottoman forces during February and March 1897. The warships of the International Squadron bombarded the insurgents to break up their attacks and put an international force of sailors and
marines
Marines, or naval infantry, are typically a military force trained to operate in littoral zones in support of naval operations. Historically, tasks undertaken by marines have included helping maintain discipline and order aboard the ship (refle ...
ashore to occupy Canea, and by the end of March major fighting on Crete came to an end, although the uprising continued.
Opposing forces
The Greek army was made of three divisions, with two of them taking positions in
Thessaly
Thessaly ( el, Θεσσαλία, translit=Thessalía, ; ancient Thessalian: , ) is a traditional geographic and modern administrative region of Greece, comprising most of the ancient region of the same name. Before the Greek Dark Ages, The ...
and one in
Arta,
Epirus
sq, Epiri rup, Epiru
, native_name_lang =
, settlement_type = Historical region
, image_map = Epirus antiquus tabula.jpg
, map_alt =
, map_caption = Map of ancient Epirus by Heinri ...
. Crown Prince
Constantine
Constantine most often refers to:
* Constantine the Great, Roman emperor from 306 to 337, also known as Constantine I
*Constantine, Algeria, a city in Algeria
Constantine may also refer to:
People
* Constantine (name), a masculine given name ...
was the only general in the army. He took command of the forces on 25 March. The Greek army in Thessaly consisted of 45,000 men,
[David Eggenberger: ''An Encyclopedia of Battles: Accounts of Over 1,560 Battles from 1479 B.C. to the Present'', Courier Dover Publications, 1985, ]
page 450
500 cavalry, and 96 guns, while that of Epirus comprised 16,000 men and 40 guns.
The opposing Ottoman army consisted of eight infantry divisions largely made by Albanians and one cavalry division. On the Thessaly front, it consisted of 58,000 men,
1,300 cavalry, and 186 guns, while in Epirus it could field 26,000 men and 29 guns.
Edhem Pasha had overall command of the Ottoman forces.
Apart from the obvious difference in numbers, the two sides had also significant differences in the quality of armaments and soldiers. The Ottoman army was already being equipped with its second generation of
smokeless powder
Finnish smokeless powderSmokeless powder is a type of propellant used in firearms and artillery that produces less smoke and less fouling when fired compared to gunpowder ("black powder"). The combustion products are mainly gaseous, compared t ...
repeater rifles (
Mauser Models 1890 and 1893), while the Greeks were equipped with the inferior
single-shot
Single-shot firearms are firearms that hold only a single round of ammunition, and must be reloaded manually after every shot. The history of firearms began with single-shot designs, then multi-barreled designs appeared, and eventually many cent ...
Gras rifle
The Fusil Modèle 1874 or Gras was the French Army's primary service rifle from 1874 to 1886. Designed by Colonel Basile Gras, the Gras was a metallic cartridge adaptation of the single-shot, breech-loading, black powder Chassepot rifle. It was ...
. There was also the potential for a naval contest. In 1897 the Greek navy consisted of three small
''Hydra'' class battleships, one cruiser, the ''
Miaoulis'', and several older small ironclads and gunboats.
[Conways, p. 387-8] The Greek ships bombarded Turkish fortifications and escorted troop transports, but there was no major naval battle during the war. The
Ottoman fleet had seven battleships and ironclads at least as large as the Greek battleships, and although most of these were obsolete designs, the had been rebuilt and modernized. The Ottoman navy also had several smaller ironclads, two unprotected cruisers and smaller ships including torpedo craft.
[Conways, p. 389-92] The Ottoman fleet had not been maintained, perhaps due to the Sultan’s fear of a strong navy becoming a power base for plots against the government, and in 1897 when called into action most of the ships were in poor condition and could not contest control of the sea beyond the Dardanelles.
[Pears, Forty Years in Constantinople
]
War
On 24 March, about 2,600 irregulars crossed the Greek border into Ottoman
Macedonia in order to provoke disarray behind enemy lines by rousing locals against Ottoman administration. As a result, on 6 April Edhem Pasha mobilised his forces. His plan was to surround Greek forces and by using river
Pineios as a natural barrier to push them back to
central Greece
Continental Greece ( el, Στερεά Ελλάδα, Stereá Elláda; formerly , ''Chérsos Ellás''), colloquially known as Roúmeli (Ρούμελη), is a traditional geographic region of Greece. In English, the area is usually called Central ...
. Nevertheless, his rear forces were halted while the center of his formation gained ground, altering his initial plans. The Greek plan called for a wider open field combat, which ultimately would cost heavy casualties against an already superior opponent.
There was no serious force left to prevent the Ottoman Army from entering the Greek capital, Athens. Halil Rıfat Pasha, asked Abdulhamid for permission to enter Athens. In agreement with the Great powers, the Russian Tsar, Nicholas II, telegraphed Abdulhamid himself and demanded that the war be stopped. On May 19, in accordance with the Sultan's will, the Ottoman army stopped its advance. On 20 May 1897, a ceasefire went into effect.
Thessalian Front
Officially, war was declared on 18 April when the Ottoman ambassador in Athens, Asim Bey, met with the Greek foreign minister announcing the cutting of diplomatic ties. Heavy fighting occurred between the 21–22 April outside the town of
Tyrnavos
Tyrnavos ( el, Τύρναβος) is a municipality in the Larissa regional unit, of the Thessaly region of Greece. It is the second-largest town of the Larissa regional unit, after Larissa. The town is near the mountains and the Thessalian Plain ...
but when the overwhelming Ottoman forces converged and pushed together, the Greek general staff ordered a general withdrawal, spreading panic among soldiers and civilians alike.
Larissa fell on 27 April, while the Greek front was being reorganised behind the strategic lines of Velestino, in
Farsala
Farsala ( el, Φάρσαλα), known in Antiquity as Pharsalos ( grc, Φάρσαλος, la, Pharsalus), is a city in southern Thessaly, in Greece. Farsala is located in the southern part of Larissa regional unit, and is one of its largest towns. ...
. Nevertheless, a division was ordered to head for Velestino, thus cutting Greek forces in two, 60 km apart. Between 27 and 30 April, under the command of Col.
Konstantinos Smolenskis, Greek forces checked and halted the Ottoman advance.
On 5 May three Ottoman divisions attacked Farsala, forcing an orderly withdrawal of Greek forces to
Domokos
Domokos ( el, Δομοκός), the ancient Thaumacus or Thaumace (Θαυμακός, Θαυμάκη), is a town and a municipality in Phthiotis, Greece. The town Domokos is the seat of the municipality of Domokos and of the former Domokos Province. ...
; on the eve of those events Smolenskis had withdrawn from newly recaptured Velestino to Almyros.
Volos
Volos ( el, Βόλος ) is a coastal port city in Thessaly situated midway on the Greek mainland, about north of Athens and south of Thessaloniki. It is the sixth most populous city of Greece, and the capital of the Magnesia regional unit ...
fell into Ottoman hands on 8 May.
At Domokos the Greeks assembled 40,000 men in a strong defensive position, joined by about 2,000
Italian
Italian(s) may refer to:
* Anything of, from, or related to the people of Italy over the centuries
** Italians, an ethnic group or simply a citizen of the Italian Republic or Italian Kingdom
** Italian language, a Romance language
*** Regional Ita ...
''"
Redshirt
Redshirt, Red Shirt, or Redshirts may refer to:
Entertainment
* ''Red Shirts'' (film), a 1952 film about Anita Garibaldi by Franco Rossi
* Redshirt (stock character), originally derived from ''Star Trek'', a stock character who dies soon after ...
"'' volunteers under the command of
Ricciotti Garibaldi, son of
Giuseppe Garibaldi. The Ottoman Empire had a total of about 70,000 troops, of whom about 45,000 were directly engaged in the battle.
On 16 May the attackers sent part of their army around the flank of the Greeks to cut off their line of retreat, but it failed to arrive in time. The next day, the rest of their army made a frontal assault. Both sides fought ferociously. The Ottomans were held at bay by the fire of the defending infantry until their left flank defeated the Greek right. The Ottoman formation broke through, forcing a renewed withdrawal. Smolenskis was ordered to stand his ground at the
Thermopylae
Thermopylae (; Ancient Greek and Katharevousa: (''Thermopylai'') , Demotic Greek (Greek): , (''Thermopyles'') ; "hot gates") is a place in Greece where a narrow coastal passage existed in antiquity. It derives its name from its hot sulphur ...
passage, but on 20 May a ceasefire went into effect.
Epirus Front
On 18 April, Ottoman forces under
Ahmed Hifzi Pasha
Ahmed Hifzi Pasha (1832 – 1900) was an Ottoman Albanian field marshal, who was the Commander-in-Chief of the Ottoman Army that defeated the Greeks on the Epirus front in the Greco-Turkish War (1897). He was also the commander in the Battle o ...
attacked the bridge of
Arta but were forced to withdraw and reorganise around Pente Pigadia. Five days later Col.
Thrasyvoulos Manos
Thrasyvoulos Manos ( el, Θρασύβουλος Μάνος, 1835-1922) was an officer, later Major general of the Hellenic Army.
Early life and ancestry
Born in 1835, to the Phanariot Manos family, he was the son of the poet, writer and philosop ...
captured Pente Pigadia, but the Greek advance was halted due to lack of reinforcements against an already numerically superior opposition. On 12 May Greek forces tried to cut off
Preveza
Preveza ( el, Πρέβεζα, ) is a city in the region of Epirus, northwestern Greece, located on the northern peninsula at the mouth of the Ambracian Gulf. It is the capital of the regional unit of Preveza, which is part of the region of Epiru ...
but were forced to retreat with heavy casualties.
Armistice
On 20 September
a peace treaty was signed between the two sides. Greece was forced to cede minor border areas and pay heavy reparations. To pay the latter, the Greek economy
came under international supervision. For the Greek public opinion and the military, the forced armistice was a humiliation, highlighting the unpreparedness of the country to fulfill its national aspirations (
Megali Idea
The Megali Idea ( el, Μεγάλη Ιδέα, Megáli Idéa, Great Idea) is a nationalist and irredentist concept that expresses the goal of reviving the Byzantine Empire, by establishing a Greek state, which would include the large Greek popu ...
).
Map gallery
File:Disposition of the Turkish & Greek forces on April 1, 1897.jpg, Disposition of the Greek and Ottoman forces on 1 April
File:Disposition of the Turkish & Greek forces on April 25, 1897.jpg, Disposition of the Greek and Ottoman forces on 25 April
File:Disposition of the Turkish & Greek forces on May 4, 1897.jpg, Disposition of the Greek and Ottoman forces on 4 May
File:Disposition of the Turkish & Greek forces on May 10, 1897.jpg, Disposition of the Greek and Ottoman forces on 10 May
File:Disposition of the Turkish & Greek forces on May 20, 1897.jpg, Disposition of the Greek and Ottoman forces on 20 May
Aftermath
Despite the end of the war, the uprising on Crete continued – although with no further organized combat – until November 1898, when the Great Powers evicted Ottoman forces from the island to make way for an autonomous
Cretan State
The Cretan State ( el, Κρητική Πολιτεία, Kritiki Politeia; ota, كريد دولتى, Girid Devleti) was established in 1898, following the intervention by the Great Powers (United Kingdom, France, Italy, Austria-Hungary, Germany ...
under the
suzerainty of the Ottoman Empire. Officially founded in December 1898 when
Prince George of Greece and Denmark
Prince George of Greece and Denmark ( el, Γεώργιος; 24 June 1869 – 25 November 1957) was the second son and child of George I of Greece and Olga Konstantinovna of Russia, and is remembered chiefly for having once saved the life of hi ...
arrived on Crete to take up his duties as
High Commissioner, the Cretan State survived until 1913, when Greece formally annexed the island.
[McTiernan, pp. 35-39.]
In Greece, the public awareness of the country's unpreparedness for war in pursuit of its national aspirations laid the seeds for the
Goudi coup
The Goudi coup ( el, κίνημα στο Γουδί) was a military coup d'état that took place in Greece on the night of , starting at the barracks in Goudi, a neighborhood on the eastern outskirts of Athens. The coup was a pivotal event in mod ...
of 1909, which called for immediate reforms in the Greek Army, economy, and society. When
Eleftherios Venizelos came to power, as a leader of the Liberal party, he instigated reforms that transformed the Greek state, leading it to victory in the
Balkan Wars fifteen years later.
See also
*
International Squadron (Cretan intervention, 1897–1898)
The International Squadron was a naval squadron formed by a number of Great Powers in early 1897, just before the outbreak of the Greco-Turkish War of 1897, to intervene in a native Greek rebellion on Crete against rule by the Ottoman Empire. War ...
References
Bibliography
*
*
* Revised edition:
*
McTiernan, Mick, ''A Very Bad Place Indeed For a Soldier. The British involvement in the early stages of the European Intervention in Crete. 1897 - 1898,'' King's College, London, September 2014.*Pears, Sir Edwin. “Forty Years in Constantinople” (1916)
*
External links
*
*
'
{{DEFAULTSORT:Greco-Turkish War (1897)
1897 in the Ottoman Empire
Conflicts in 1897
Wars involving Greece
Wars involving the Ottoman Empire
1897 in Greece
Greece–Ottoman Empire relations