Oeselians
Encyclopedia
The Oeselians were a historical Finnic
Finnic peoples
The Finnic or Fennic peoples were historic ethnic groups who spoke various languages traditionally classified as Finno-Permic...

 people inhabiting Saaremaa
Saare County
Saare County , or Saaremaa, is one of 15 counties of Estonia. It consists of Saaremaa , the largest island of Estonia, and several smaller islands near it. The county borders Lääne County to the east and Hiiu County to the north...

 ( or ), an Estonia
Estonia
Estonia , officially the Republic of Estonia , is a state in the Baltic region of Northern Europe. It is bordered to the north by the Gulf of Finland, to the west by the Baltic Sea, to the south by Latvia , and to the east by Lake Peipsi and the Russian Federation . Across the Baltic Sea lies...

n island in the Baltic Sea
Baltic Sea
The Baltic Sea is a brackish mediterranean sea located in Northern Europe, from 53°N to 66°N latitude and from 20°E to 26°E longitude. It is bounded by the Scandinavian Peninsula, the mainland of Europe, and the Danish islands. It drains into the Kattegat by way of the Øresund, the Great Belt and...

. They are first thought to be mentioned as early as the 2nd century BC in Ptolemy's
Ptolemy
Claudius Ptolemy , was a Roman citizen of Egypt who wrote in Greek. He was a mathematician, astronomer, geographer, astrologer, and poet of a single epigram in the Greek Anthology. He lived in Egypt under Roman rule, and is believed to have been born in the town of Ptolemais Hermiou in the...

 Geography III.
The Oeselians along with Curonians
Curonians
The Curonians or Kurs were a Baltic tribe living on the shores of the Baltic sea in what are now the western parts of Latvia and Lithuania from the 5th to the 16th centuries, when they merged with other Baltic tribes. They gave their name to the region of Courland , and they spoke the Old...

 were known in the Old Norse
Old Norse
Old Norse is a North Germanic language that was spoken by inhabitants of Scandinavia and inhabitants of their overseas settlements during the Viking Age, until about 1300....

 Icelandic Sagas and in Heimskringla
Heimskringla
Heimskringla is the best known of the Old Norse kings' sagas. It was written in Old Norse in Iceland by the poet and historian Snorri Sturluson ca. 1230...

 as Víkingr frá Esthland (Estonian Vikings). Their sailing vessels were called pirate ships by Henry of Livonia in his Latin chronicles from the beginning of the 13th century.

Eistland or Esthland is the historical Germanic language name that refers to the country at the eastern shores of the Baltic Sea in general, and is the origin of the modern national name for Estonia. The mainland of modern Estonia in the 8th century Ynglinga saga
Ynglinga saga
Ynglinga saga is a legendary saga, originally written in Old Norse by the Icelandic poet Snorri Sturluson about 1225. It was first translated into English and published in 1844....

 was called Adalsyssla in contrast to Eysyssel or Ösyssla that was the name of the island , the home of the Oeselians . In the 11th century Courland
Courland
Courland is one of the historical and cultural regions of Latvia. The regions of Semigallia and Selonia are sometimes considered as part of Courland.- Geography and climate :...

 and Estland (Estonia) were both denoted separately by Adam of Bremen
Adam of Bremen
Adam of Bremen was a German medieval chronicler. He lived and worked in the second half of the eleventh century. He is most famous for his chronicle Gesta Hammaburgensis Ecclesiae Pontificum .-Background:Little is known of his life other than hints from his own chronicles...

.

On the eve of Northern Crusades
Northern Crusades
The Northern Crusades or Baltic Crusades were crusades undertaken by the Christian kings of Denmark and Sweden, the German Livonian and Teutonic military orders, and their allies against the pagan peoples of Northern Europe around the southern and eastern shores of the Baltic Sea...

, the Oeselians were summarized in the Livonian Rhymed Chronicle
Livonian Rhymed Chronicle
The Livonian Rhymed Chronicle was a chronicle written in Low German by an anonymous writer. It covers the period 1180 – 1290 and contains a wealth of detail about Livonia — modern Estonia and Latvia....

 thus: "The Oeselians, neighbors to the Kurs (Curonians
Curonians
The Curonians or Kurs were a Baltic tribe living on the shores of the Baltic sea in what are now the western parts of Latvia and Lithuania from the 5th to the 16th centuries, when they merged with other Baltic tribes. They gave their name to the region of Courland , and they spoke the Old...

), are surrounded by the sea and never fear strong armies as their strength is in their ships. In summers when they can travel across the sea they oppress the surrounding lands by raiding both Christians and pagans."

Battles and raids

Saxo Grammaticus
Saxo Grammaticus
Saxo Grammaticus also known as Saxo cognomine Longus was a Danish historian, thought to have been a secular clerk or secretary to Absalon, Archbishop of Lund, foremost advisor to Valdemar I of Denmark. He is the author of the first full history of Denmark.- Life :The Jutland Chronicle gives...

 describes the Curonians and Estonians as participating in the Battle of Bråvalla on the side of the Swedes against the Danes, who were aided by the Livonians and the Wends
Wends
Wends is a historic name for West Slavs living near Germanic settlement areas. It does not refer to a homogeneous people, but to various peoples, tribes or groups depending on where and when it is used...

 of Pomerania
Pomerania
Pomerania is a historical region on the south shore of the Baltic Sea. Divided between Germany and Poland, it stretches roughly from the Recknitz River near Stralsund in the West, via the Oder River delta near Szczecin, to the mouth of the Vistula River near Gdańsk in the East...

. It is notable that other Baltic
Balts
The Balts or Baltic peoples , defined as speakers of one of the Baltic languages, a branch of the Indo-European language family, are descended from a group of Indo-European tribes who settled the area between the Jutland peninsula in the west and Moscow, Oka and Volga rivers basins in the east...

 tribes — i.e., the Letts and Lithuanians
Lithuanians
Lithuanians are the Baltic ethnic group native to Lithuania, where they number around 2,765,600 people. Another million or more make up the Lithuanian diaspora, largely found in countries such as the United States, Brazil, Canada, Colombia, Russia, United Kingdom and Ireland. Their native language...

 — are not mentioned by Saxo as participating in the fight.
Snorri Sturluson
Snorri Sturluson
Snorri Sturluson was an Icelandic historian, poet, and politician. He was twice elected lawspeaker at the Icelandic parliament, the Althing...

 relates in his Ynglinga saga
Ynglinga saga
Ynglinga saga is a legendary saga, originally written in Old Norse by the Icelandic poet Snorri Sturluson about 1225. It was first translated into English and published in 1844....

how the Swedish king Ingvar
Ingvar
Yngvar Harra Proto-Norse *Ingu-Hariz was the son of Östen and reclaimed the Swedish throne for the House of Yngling after the Swedes had rebelled against Sölvi....

 (7th century), the son of Östen
Östen
Eysteinn was the son of Eadgils and Yrsa of Saxony. He was the father of Ingvar. The Eysteinn tumulus in Västerås near Östanbro has been linked to King Eysteinn by some popular historians...

 and a great warrior, who was forced to patrol the shores of his kingdom fighting Estonian vikings. The saga speaks of his invasion of Estonia where he fell in a battle against the men of Estland who had come down with a great army. After the battle, King Ingvar
Ingvar
Yngvar Harra Proto-Norse *Ingu-Hariz was the son of Östen and reclaimed the Swedish throne for the House of Yngling after the Swedes had rebelled against Sölvi....

 was buried close to the seashore in Estonia and the Swedes returned home.

According to Heimskringla
Heimskringla
Heimskringla is the best known of the Old Norse kings' sagas. It was written in Old Norse in Iceland by the poet and historian Snorri Sturluson ca. 1230...

 sagas, in the year 967 the Norwegian
Norway
Norway , officially the Kingdom of Norway, is a Nordic unitary constitutional monarchy whose territory comprises the western portion of the Scandinavian Peninsula, Jan Mayen, and the Arctic archipelago of Svalbard and Bouvet Island. Norway has a total area of and a population of about 4.9 million...

 Queen Astrid escaped with her son, later king of Norway
Norway
Norway , officially the Kingdom of Norway, is a Nordic unitary constitutional monarchy whose territory comprises the western portion of the Scandinavian Peninsula, Jan Mayen, and the Arctic archipelago of Svalbard and Bouvet Island. Norway has a total area of and a population of about 4.9 million...

 Olaf Tryggvason from her homeland to Novgorod, where her brother Sigurd held an honoured position at the court of Prince Vladimir. On their journey, Oeselian Vikings raided the ship, killing some of the crew and taking others into slavery. Six years later, when Sigurd Eirikson traveled to Estonia to collect taxes on behalf of Valdemar, he spotted Olaf in a market on Saaremaa
Saaremaa
Saaremaa is the largest island in Estonia, measuring 2,673 km². The main island of Saare County, it is located in the Baltic Sea, south of Hiiumaa island, and belongs to the West Estonian Archipelago...

 and paid for his freedom.

A battle between Oeselian and Iceland
Iceland
Iceland , described as the Republic of Iceland, is a Nordic and European island country in the North Atlantic Ocean, on the Mid-Atlantic Ridge. Iceland also refers to the main island of the country, which contains almost all the population and almost all the land area. The country has a population...

ic Vikings off Saaremaa
Saaremaa
Saaremaa is the largest island in Estonia, measuring 2,673 km². The main island of Saare County, it is located in the Baltic Sea, south of Hiiumaa island, and belongs to the West Estonian Archipelago...

 is described in Njál's saga
Njál's saga
Njáls saga is one of the sagas of Icelanders. The most prominent characters are the friends Njáll Þorgeirsson, a lawyer and a sage, and Gunnarr Hámundarson, a formidable warrior...

 as occurring in 972 AD.

About 1008, Olaf the Holy, later king of Norway
Norway
Norway , officially the Kingdom of Norway, is a Nordic unitary constitutional monarchy whose territory comprises the western portion of the Scandinavian Peninsula, Jan Mayen, and the Arctic archipelago of Svalbard and Bouvet Island. Norway has a total area of and a population of about 4.9 million...

, landed on Saaremaa. The Oeselians, taken by surprise, had at first tried to negotiate the demands made by the Norwegians, but then gathered an army and confronted them. Nevertheless Olaf (then 13 years old) is reputed to have won the battle. Olaf was the subject of several biographies, both hagiographies and sagas, in the Middle Ages, and many of the historical facts concerning his adventures are disputed.

Around the year 1030, a Swedish
Sweden
Sweden , officially the Kingdom of Sweden , is a Nordic country on the Scandinavian Peninsula in Northern Europe. Sweden borders with Norway and Finland and is connected to Denmark by a bridge-tunnel across the Öresund....

 Viking
Viking
The term Viking is customarily used to refer to the Norse explorers, warriors, merchants, and pirates who raided, traded, explored and settled in wide areas of Europe, Asia and the North Atlantic islands from the late 8th to the mid-11th century.These Norsemen used their famed longships to...

 chief called Freygeirr
Freygeirr
Freygeirr was a Viking chieftain who probably led a leidang expedition. He is considered to have been active in the 1050s on the Baltic coast, and he has been identified on six runestones, Gs 13, DR 216, U 518, U 611, U 698 and U 1158.On the runestone Gs 13, Freygeirr is reported to be the leader...

 may have been killed in a battle on Saaremaa
Saaremaa
Saaremaa is the largest island in Estonia, measuring 2,673 km². The main island of Saare County, it is located in the Baltic Sea, south of Hiiumaa island, and belongs to the West Estonian Archipelago...

.

According to the Novgorod Chronicle, Varyag
Varyag
-People:*Varangians, ancestors of the Rus' sometimes called "Vikings" in English publications*Variags of Khand, a people of J. R. R. Tolkien's Middle-earth legendarium- Ships :...

 Ulf (Uleb) from Novgorod was crushed by Estonians in a sea battle close to the town of Lindanise in 1032.

From the 12th century, chroniclers' descriptions of Estonian, Oeselian and Curonian
Curonians
The Curonians or Kurs were a Baltic tribe living on the shores of the Baltic sea in what are now the western parts of Latvia and Lithuania from the 5th to the 16th centuries, when they merged with other Baltic tribes. They gave their name to the region of Courland , and they spoke the Old...

 raids along the coasts of Sweden
Sweden
Sweden , officially the Kingdom of Sweden , is a Nordic country on the Scandinavian Peninsula in Northern Europe. Sweden borders with Norway and Finland and is connected to Denmark by a bridge-tunnel across the Öresund....

 and Denmark
Denmark
Denmark is a Scandinavian country in Northern Europe. The countries of Denmark and Greenland, as well as the Faroe Islands, constitute the Kingdom of Denmark . It is the southernmost of the Nordic countries, southwest of Sweden and south of Norway, and bordered to the south by Germany. Denmark...

 become more frequent.

The Chronicle of Henry of Livonia
Chronicle of Henry of Livonia
The Livonian Chronicle of Henry is a document describing historic events in Livonia and surrounding areas from 1180 to 1227. Apart from the few references in the Primary Chronicle compiled in Kievan Rus' in the twelfth century, it is the oldest known written document about the history of these...

 describes a fleet of sixteen ships and five hundred Oeselians ravaging the area that is now southern Sweden
Sweden
Sweden , officially the Kingdom of Sweden , is a Nordic country on the Scandinavian Peninsula in Northern Europe. Sweden borders with Norway and Finland and is connected to Denmark by a bridge-tunnel across the Öresund....

, then belonging to Denmark
Denmark
Denmark is a Scandinavian country in Northern Europe. The countries of Denmark and Greenland, as well as the Faroe Islands, constitute the Kingdom of Denmark . It is the southernmost of the Nordic countries, southwest of Sweden and south of Norway, and bordered to the south by Germany. Denmark...

. In the XIVth book of Gesta Danorum
Gesta Danorum
Gesta Danorum is a patriotic work of Danish history, by the 12th century author Saxo Grammaticus . It is the most ambitious literary undertaking of medieval Denmark and is an essential source for the nation's early history...

, Saxo Grammaticus
Saxo Grammaticus
Saxo Grammaticus also known as Saxo cognomine Longus was a Danish historian, thought to have been a secular clerk or secretary to Absalon, Archbishop of Lund, foremost advisor to Valdemar I of Denmark. He is the author of the first full history of Denmark.- Life :The Jutland Chronicle gives...

 describes a battle on Öland
Öland
' is the second largest Swedish island and the smallest of the traditional provinces of Sweden. Öland has an area of 1,342 km² and is located in the Baltic Sea just off the coast of Småland. The island has 25,000 inhabitants, but during Swedish Midsummer it is visited by up to 500,000 people...

 in 1170 in which the Danish king Valdemar I
Valdemar I
Valdemar I is the name of:* Vladimir I of Kiev , grand prince of Kiev* Valdemar I of Denmark , King of Denmark from 1157 until 1182* Valdemar of Sweden...

 mobilised his entire fleet to curb the incursions of Couronian and Estonian pirates.

Perhaps the most renowned raid by Oeselian pirates occurred in 1187, with the attack on the Swedish town of Sigtuna
Sigtuna
Sigtuna is a locality situated in Sigtuna Municipality, Stockholm County, Sweden with 18 inhabitants in 2005. It is the namesake of the municipality even though the seat is in Märsta....

 by Finnic raiders from Couronia and Oesel. Among the casualties of this raid was the Swedish archbishop Johannes
Johannes (archbishop of Uppsala)
Johannes was the second Archbishop of Uppsala, Sweden. His short-lived reign was between 1185 and 1187.His name is sometimes spelled as Johan, the Swedish form of Johannes, but since the Swedish language had yet to be established it is of little importance. About Johannes little is known...

. The city remained occupied for some time, contributing to the decline as a center of commerce in the 13th century in favor of Uppsala
Uppsala
- Economy :Today Uppsala is well established in medical research and recognized for its leading position in biotechnology.*Abbott Medical Optics *GE Healthcare*Pfizer *Phadia, an offshoot of Pharmacia*Fresenius*Q-Med...

, Visby
Visby
-See also:* Battle of Visby* Gotland University College* List of governors of Gotland County-External links:* - Visby*...

, Kalmar
Kalmar
Kalmar is a city in Småland in the south-east of Sweden, situated by the Baltic Sea. It had 62,767 inhabitants in 2010 and is the seat of Kalmar Municipality. It is also the capital of Kalmar County, which comprises 12 municipalities with a total of 233,776 inhabitants .From the thirteenth to the...

 and Stockholm
Stockholm
Stockholm is the capital and the largest city of Sweden and constitutes the most populated urban area in Scandinavia. Stockholm is the most populous city in Sweden, with a population of 851,155 in the municipality , 1.37 million in the urban area , and around 2.1 million in the metropolitan area...

.

The Livonian Chronicle
Livonian Chronicle
Livonian Chronicle may refer to one of the following chronicles.*Livonian Rhymed Chronicle**By anonymous **By Bartholomäus Hoeneke *Chronicle of Henry of Livonia *By Hermann de Wartberge...

 describes the Oeselians as using two kinds of ships, the piratica and the liburna. The former was a warship, the latter mainly a merchant ship. A piratica could carry approximately 30 men and had a high prow shaped like a dragon or a snakehead as well as a quadrangular sail.

Viking-age
Viking Age
Viking Age is the term for the period in European history, especially Northern European and Scandinavian history, spanning the late 8th to 11th centuries. Scandinavian Vikings explored Europe by its oceans and rivers through trade and warfare. The Vikings also reached Iceland, Greenland,...

 treasures from Estonia
Estonia
Estonia , officially the Republic of Estonia , is a state in the Baltic region of Northern Europe. It is bordered to the north by the Gulf of Finland, to the west by the Baltic Sea, to the south by Latvia , and to the east by Lake Peipsi and the Russian Federation . Across the Baltic Sea lies...

 mostly contain silver
Silver
Silver is a metallic chemical element with the chemical symbol Ag and atomic number 47. A soft, white, lustrous transition metal, it has the highest electrical conductivity of any element and the highest thermal conductivity of any metal...

 coins and bars. Compared to its close neighbors, Saaremaa
Saaremaa
Saaremaa is the largest island in Estonia, measuring 2,673 km². The main island of Saare County, it is located in the Baltic Sea, south of Hiiumaa island, and belongs to the West Estonian Archipelago...

 has the richest finds of Viking treasures after Gotland
Gotland
Gotland is a county, province, municipality and diocese of Sweden; it is Sweden's largest island and the largest island in the Baltic Sea. At 3,140 square kilometers in area, the region makes up less than one percent of Sweden's total land area...

 in Sweden. This strongly suggests that Estonia
Estonia
Estonia , officially the Republic of Estonia , is a state in the Baltic region of Northern Europe. It is bordered to the north by the Gulf of Finland, to the west by the Baltic Sea, to the south by Latvia , and to the east by Lake Peipsi and the Russian Federation . Across the Baltic Sea lies...

 was an important transit country during the Viking era.

Religion and mythology

The superior god of Oeselians as described by Henry of Livonia was called Tharapita
Tharapita
Tharapita or Taarapita or Taara is a god in Estonian mythology.The Chronicle of Henry of Livonia mentions Tharapita as the superior god of Oeselians , also well known to Vironian tribes in northern Estonia...

. According to the legend in the chronicle Tharapita was born on a forested mountain in Virumaa
Virumaa
Virumaa is a former independent county in Ancient Estonia. Now it is divided into Ida-Viru County or Eastern Vironia and Lääne-Viru County or Western Vironia...

 , mainland Estonia from where he flew to Oesel , Saaremaa The name Taarapita has been interpreted as "Thor, help!" (Taara a(v)ita in Estonian) and associated with the Scandinavian god Thor
Thor
In Norse mythology, Thor is a hammer-wielding god associated with thunder, lightning, storms, oak trees, strength, the protection of mankind, and also hallowing, healing, and fertility...

. The story of Tharapita's or Taara's flight from Vironia to Saaremaa has been associated with a major meteor
METEOR
METEOR is a metric for the evaluation of machine translation output. The metric is based on the harmonic mean of unigram precision and recall, with recall weighted higher than precision...

 disaster
Kaali crater
Kaali is a group of 9 meteorite craters located on the Estonian island of Saaremaa. Formed in the 7th century BC or about 4000 years ago , it is one of the most recent craters created by an impact event and the only known major impact event that has occurred in a populated area.Prior to the 1930s,...

 estimated to have happened in 660 ± 85 B.C. that formed Kaali crater
Kaali crater
Kaali is a group of 9 meteorite craters located on the Estonian island of Saaremaa. Formed in the 7th century BC or about 4000 years ago , it is one of the most recent craters created by an impact event and the only known major impact event that has occurred in a populated area.Prior to the 1930s,...

 in Saaremaa.

Archeology

Estonia constitutes one of the richest territories in the Baltic for hoards from the 11th and the 12th centuries. The earliest coin hoards found in Estonia are Arabic Dirham
Dirham
Dirham or dirhem is a unit of currency in several Arab or Berber nations, and formerly the related unit of mass in the Ottoman Empire and Persian states...

s from the 8th century. The largest Viking-Age hoards found in Estonia have been at Maidla
Maidla Parish
Maidla Parish is an Estonian municipality located in Ida-Viru County. It has a population of 772 and an area of 332.3 km².- Villages :...

 and Kose. Out of the 1500 coins published in catalogues, 1000 are Anglo-Saxon.

Decline

With the rise of centralized authority along with a bolstering of coastal defense in the areas exposed to Vikings, Viking raids became more risky and less profitable. With the growing presence of Christianity and the rise of kings and a quasi-feudal system in Scandinavia, these raids ceased entirely. By the 11th century, the Scandinavians are frequently chronicled as clashing with the Vikings from the eastern shores of the Baltic Sea, which would ultimately lead to German, Danish and Swedish participation in the Northern crusades
Northern Crusades
The Northern Crusades or Baltic Crusades were crusades undertaken by the Christian kings of Denmark and Sweden, the German Livonian and Teutonic military orders, and their allies against the pagan peoples of Northern Europe around the southern and eastern shores of the Baltic Sea...

 and the Scandinavian conquest of Estonia.

The eastern Baltic world would be transformed by military conquest. First the Livs, Letts
Letts
Letts may refer to the following people:*Arthur Letts, English-born millionaire developer of Holmby Hills, Los Angeles, California*Barry Letts , British actor, television director and producer...

 and Estonians
Estonians
Estonians are a Finnic people closely related to the Finns and inhabiting, primarily, the country of Estonia. They speak a Finnic language known as Estonian...

, then the Prussians and the Finns were eventually overwhelmed and underwent baptism, military occupation and sometimes extermination by German, Danish and Swedish forces.

Conquest of Oeselians

In 1206, the Danish army led by king Valdemar II and Andreas, the Bishop of Lund
Anders Sunesen
Anders Sunesen was a Danish archbishop of Lund, Scania, from March 21, 1201, at the death of Absalon, to his own death in 1228. He is the author of the Latin translation of the Scanian Law and was throughout his life engaged in integrating a Christian worldview into the old legislature...

 landed on Saaremaa and attempted to establish a stronghold without success. In 1216 the Livonian Brothers of the Sword
Livonian Brothers of the Sword
The Livonian Brothers of the Sword were a military order founded by Bishop Albert of Riga in 1202. Pope Innocent III sanctioned the establishment in 1204. The membership of the order comprised German "warrior monks"...

 and the bishop Theodorich joined forces and invaded Saaremaa over the frozen sea. In return the Oeselians raided the territories in Latvia that were under German rule the following spring . In 1220, the Swedish army led by king John I of Sweden
John I of Sweden
John I of Sweden was a Swedish king elected in 1216. -Background:John was the son of King Sverker II of Sweden of the House of Sverker and Queen Ingegerd of the Bjälbo dynasty. King Sverker had been beaten in the Battle of Lena and later killed in the Battle of Gestilren in 1210...

 and the bishop Karl of Linköping
Karl Magnusson (Bjälboätten)
Karl Magnusson from the House of Bjelbo was the Bishop of Linköping during 1216-1220. He died at the Battle of Lihula in Estonia.-Biography:...

 conquered Lihula
Lihula
Lihula is a town in Estonia with population of 1,614 . It is a centre of a rural municipality in Lääne County.The castle of Leal was first mentioned in 1211. It was the centre of Diocese Saare-Lääne...

 in Rotalia in Western Estonia. Oeselians attacked the Swedish stronghold the same year, conquered it and killed the entire Swedish garrison including the Bishop of Linköping.

In 1222, the Danish king Valdemar II attempted the second conquest of Saaremaa, this time establishing a stone fortress housing a strong garrison. The Danish stronghold was besieged and surrendered within five days, the Danish garrison returned to Revel
Revel
- Places :* Revel, Haute-Garonne, a commune of the Haute-Garonne department in south-western France* Revel, Isère, a commune in the Isère department in south-eastern France* Revel-Tourdan, in the Isère département...

, leaving bishop Albert of Riga' brother Theodoric and few others behind hostages as pledges for peace. The castle was leveled to the ground by Oeselians.

In 1227, the Livonian Brothers of the Sword, the town of Riga
Riga
Riga is the capital and largest city of Latvia. With 702,891 inhabitants Riga is the largest city of the Baltic states, one of the largest cities in Northern Europe and home to more than one third of Latvia's population. The city is an important seaport and a major industrial, commercial,...

 and the Bishop of Riga organized combined attack against Saaremaa. After the surrender of 2 major Oeselian strongholds, Muhu
Muhu
Muhu , is an island in the Baltic Sea. With an area of 198 km² it is the third largest island belonging to Estonia, after Saaremaa and Hiiumaa....

 and Valjala
Valjala
Valjala is a small borough in Saare County in western Estonia, administrative centre of Valjala Commune.The Valjala church lies in centre of Valjala....

, the Oeselians formally accepted Christianity.

In 1236, after the defeat of the Livonian Brothers of the Sword in the Battle of Saule, military action on Saaremaa broke out again.

Oeselians accepted Christianity
Christianity
Christianity is a monotheistic religion based on the life and teachings of Jesus as presented in canonical gospels and other New Testament writings...

 again by signing treaties with the Livonian Order
Livonian Order
The Livonian Order was an autonomous Livonian branch of the Teutonic Order and a member of the Livonian Confederation from 1435–1561. After being defeated by Samogitians in the 1236 Battle of Schaulen , the remnants of the Livonian Brothers of the Sword were incorporated into the Teutonic Knights...

's Master Andreas de Velven and the Bishopric of Ösel-Wiek
Bishopric of Ösel-Wiek
The Bishopric of Ösel–Wiek was a semi-independent Roman Catholic prince-bishopric in what is now Saare, Hiiu and Lääne counties of Estonia.The bishopric was created as a state of Holy Roman Empire on 1 October 1228, by Henry, King of the Romans...

 in 1241. The next treaty was signed in 1255 by the Master of the Order, Anno Sangerhausenn, and, on behalf of the Oeselians, by elders whose "names" (or declaration?) had been phonetically transcribed by Latin scribes as Ylle, Culle, Enu, Muntelene, Tappete, Yalde, Melete, and Cake The treaty granted several extraordinary rights to the Oeselians. The 1255 treaty included unique clauses concerning the ownership and inheritance of land, the social system, and exemption from certain restrictive religious observances.

In 1261, warfare continued as the Oeselians had again renounced Christianity and killed all the Germans on the island. A peace treaty was signed after the united forces of the Livonian Order
Livonian Order
The Livonian Order was an autonomous Livonian branch of the Teutonic Order and a member of the Livonian Confederation from 1435–1561. After being defeated by Samogitians in the 1236 Battle of Schaulen , the remnants of the Livonian Brothers of the Sword were incorporated into the Teutonic Knights...

, the Bishopric of Ösel-Wiek
Bishopric of Ösel-Wiek
The Bishopric of Ösel–Wiek was a semi-independent Roman Catholic prince-bishopric in what is now Saare, Hiiu and Lääne counties of Estonia.The bishopric was created as a state of Holy Roman Empire on 1 October 1228, by Henry, King of the Romans...

, the forces of Danish Estonia
Danish Estonia
Danish Estonia refers to the territories of present-day Estonia that were ruled by Denmark firstly during the 13th–14th centuries and again in the 16th–17th centuries....

 including mainland Estonians and Latvians defeated the Oeselians by conquering the Kaarma stronghold. Soon thereafter, the Livonian Order
Livonian Order
The Livonian Order was an autonomous Livonian branch of the Teutonic Order and a member of the Livonian Confederation from 1435–1561. After being defeated by Samogitians in the 1236 Battle of Schaulen , the remnants of the Livonian Brothers of the Sword were incorporated into the Teutonic Knights...

 established a stone fort at Pöide.

On 24 July 1343, during St. George's Night Uprising
St. George's Night Uprising
St. George’s Night Uprising in 1343–1346 was an unsuccessful attempt by the indigenous Estonian population in the Duchy of Estonia, the Bishopric of Ösel-Wiek, and the insular territories of the State of the Teutonic Order to annihilate the Danish and German rulers and landlords, who had conquered...

, the Oeselians killed all the Germans on the island, drowned all the clerics and started to besiege the Livonian Order
Livonian Order
The Livonian Order was an autonomous Livonian branch of the Teutonic Order and a member of the Livonian Confederation from 1435–1561. After being defeated by Samogitians in the 1236 Battle of Schaulen , the remnants of the Livonian Brothers of the Sword were incorporated into the Teutonic Knights...

's castle at Pöide. The Oeselians levelled the castle and killed all the defenders. In February 1344, Burchard von Dreileben led a campaign over the frozen sea to Saaremaa. The Oeselians' stronghold was conquered and their leader Vesse was hanged. In the early spring of 1345, the next campaign of the Livonian Order
Livonian Order
The Livonian Order was an autonomous Livonian branch of the Teutonic Order and a member of the Livonian Confederation from 1435–1561. After being defeated by Samogitians in the 1236 Battle of Schaulen , the remnants of the Livonian Brothers of the Sword were incorporated into the Teutonic Knights...

 took place that ended with a treaty mentioned in the Chronicle of Hermann von Wartberge
Hermann von Wartberge
Hermann von Wartberge was a chronicler of the Livonian Order. Born in Westphalia, Wartberge was a Catholic priest and author of the valuable Latin chronicle Chronicon Livoniale covering the history of the Livonian Crusade from 1196 to 1378...

 and the Novgorod First Chronicle
Novgorod First Chronicle
The Novgorod First Chronicle or The Chronicle of Novgorod, 1016-1471 is the most ancient extant chronicle of the Novgorod Republic. It reflects a tradition different from the Kievan Primary Chronicle...

. Saaremaa remained the vassal of the master of the Livonian Order
Livonian Order
The Livonian Order was an autonomous Livonian branch of the Teutonic Order and a member of the Livonian Confederation from 1435–1561. After being defeated by Samogitians in the 1236 Battle of Schaulen , the remnants of the Livonian Brothers of the Sword were incorporated into the Teutonic Knights...

, and the Bishopric of Ösel-Wiek. In 1559, after the fall of the Livonian order
Livonian Order
The Livonian Order was an autonomous Livonian branch of the Teutonic Order and a member of the Livonian Confederation from 1435–1561. After being defeated by Samogitians in the 1236 Battle of Schaulen , the remnants of the Livonian Brothers of the Sword were incorporated into the Teutonic Knights...

 in Livonian War
Livonian War
The Livonian War was fought for control of Old Livonia in the territory of present-day Estonia and Latvia when the Tsardom of Russia faced a varying coalition of Denmark–Norway, the Kingdom of Sweden, the Union of the Grand Duchy of Lithuania and the Kingdom of Poland.During the period 1558–1578,...

, the Bishopric of Ösel-Wiek
Bishopric of Ösel-Wiek
The Bishopric of Ösel–Wiek was a semi-independent Roman Catholic prince-bishopric in what is now Saare, Hiiu and Lääne counties of Estonia.The bishopric was created as a state of Holy Roman Empire on 1 October 1228, by Henry, King of the Romans...

 sold Saaremaa to Frederick II of Denmark, who resigned the lands to his brother Duke Magnus of Holstein until the island was taken back to the direct administration of Denmark and in 1645 became a part of Sweden
Sweden
Sweden , officially the Kingdom of Sweden , is a Nordic country on the Scandinavian Peninsula in Northern Europe. Sweden borders with Norway and Finland and is connected to Denmark by a bridge-tunnel across the Öresund....

 by the Treaty of Brömsebro.
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