Battle of Svolder

The Battle of Svolder was a large naval battle during the Viking age, fought in September 1000 in the western Baltic Sea between King Olaf of Norway and an alliance of the Kings of Denmark and Sweden and Olaf's enemies in Norway. The backdrop of the battle was the unification of Norway into a single independent state after longstanding Danish efforts to control the country, combined with the spread of Christianity in Scandinavia.
King Olaf Tryggvason was sailing to, or home from, an expedition in Wendland, when he was ambushed by an alliance of Svein Forkbeard, King of Denmark, Olof Skötkonung, King of Sweden, and Eirik Hákonarson, Jarl of Lade. According to the Saga of King Olaf I Tryggvason, he had 60 warships plus the contribution of 11 warships from the Jomvikings. His ships were captured one by one, last of all the Ormen Lange, which Jarl Eirik captured as Olaf threw himself into the sea. After the battle, Norway was ruled by the Jarls of Lade allied to both the Danish Crown and the Commonwealth of Uppsala, Sweden.
The exact location of the battle is disputed, and depends on which group of sources is preferred: Adam of Bremen places it in Øresund, while Icelandic sources place the battle near an island called Svolder, which is otherwise unknown.
The most detailed sources on the battle, the kings' sagas, were written approximately two centuries after it took place. Historically unreliable, they offer an extended literary account describing the battle and the events leading up to it in vivid detail. The sagas ascribe the causes of the battle to Olaf Tryggvason's ill-fated marriage proposal to Sigrid the Haughty and his problematic marriage to Thyri, sister of Svein Forkbeard. As the battle starts Olaf is shown dismissing the Danish and Swedish fleets with ethnic insults and bravado while admitting that Eirik Hákonarson and his men are dangerous because "they are Norwegians like us". The best known episode in the battle is the breaking of Einarr Þambarskelfir's bow, which heralds Olaf's defeat.
In later centuries, the saga descriptions of the battle, especially that in Snorri Sturluson's Heimskringla, have inspired a number of ballads and other works of literature.

Context

In earliest recorded history, Norway was divided into a number of small and sometimes warring petty kingdoms with weak central authority. In traditional historiography the rise of Harald Fairhair in the ninth century started the process of unification of the country and the consolidation of royal power. Harald's descendants, and other claimants to the throne, had to contend with strong regional leaders such as the Jarls of Lade in the north and the rulers of Vingulmark in the east, while the kings of Denmark claimed regions in the south and were eager to acquire Norwegian vassals to increase their influence. The spread of Roman Catholic Christianity had also become an increasingly important political issue in the late tenth century.
In the 970s, Haakon Sigurdsson, Jarl of Lade, became the most powerful man in Norway, at first supported by Harald Bluetooth of Denmark and paying tribute to him—though the two later fell out over religious matters. Harald had converted to Christianity and was eager to Christianise Norway, while Haakon remained a staunch pagan. In 995 Haakon was deposed and the young Christian leader Olaf Tryggvason came to the throne.
While rejecting Danish authority, Olaf made it his mission to convert Norway and the Norse colonies in the west as quickly and as completely as possible. Proceeding with threats, torture and executions, Olaf broke down pagan resistance and within a few years Norway was, at least nominally, a Christian country. But King Olaf had acquired several enemies during his meteoric rise to power. The most prominent were Eirik Jarl, son of Haakon Jarl, and Svein Forkbeard, king of Denmark, both of whom felt that Olaf had deprived them of their share of Norway.
The same interests which clashed in the Battle of Svolder were to divide Norway for decades to come, leading to further major engagements, including the Battle of Nesjar and the Battle of Stiklestad. The resolution came in 1035 with the accession of the Norwegian Magnus the Good to the throne of an independent and Christian Norway.

Events leading up to the battle

Nothing can be gleaned from the contemporary skaldic poems on the causes of the battle. Adam of Bremen states that Olaf Tryggvason's Danish wife, Thyri, egged him on to make war against Denmark. When Olaf heard that Svein Forkbeard and Olaf the Swede had formed an alliance, he was angered and decided the time had come for an attack. Ágrip and Historia Norwegie have a similar account. Thyri was the sister of Svein Forkbeard, and when Olaf Tryggvason married her, Svein refused to pay her promised dowry. Angered, Olaf launched an expedition to attack Denmark, but he was too impatient to wait for a fleet to assemble from all of Norway, and he set sail for the south with only 11 ships, expecting the rest to follow. When that hope was not realized, he set out for Wendland to seek allies and on the way was ambushed by Svein and his allies. These accounts are contradicted by a contemporary verse of Halldórr the Unchristian which states that Olaf Tryggvason was travelling from the south when he came to the battle.
Image:Olaf offers thyri angelica.jpg|left|thumb|upright|Olaf offers Queen Tyra a stalk of angelica. She weeps and scolds him for not daring to face up to Svein Forkbeard and retrieve her dowry.
Oddr Snorrason has an elaborate account of the problems arising from Thyri's marriages. He tells us that she was betrothed and married to the Wendish king Burislav, who received a large dowry for her; but she did not want to be his wife and starved herself after their wedding, so Burislav sent her back to Denmark. She then arranged to have herself married to Olaf Tryggvason, to the displeasure of her brother Svein. Svein's queen, Sigrid the Haughty, a staunch opponent of Olaf, egged Svein to make war on him. Svein then conspired with Jarl Sigvaldi and King Olaf of Sweden to lure Olaf Tryggvason into a trap. Olaf Tryggvason travelled to Wendland to collect Thyri's dowry from King Burislav and while there heard rumours of a planned ambush; but Sigvaldi arrived to tell him these rumours were false. Believing Sigvaldi, Olaf sent most of his fleet home, as his men were impatient. He therefore had only a small fleet left when he was ambushed near Svolder.
Fagrskinna and Heimskringla largely follow Oddr's account but simplify it and diverge from it in some respects. According to Heimskringla, Sigvaldi sailed from Wendland with Olaf and a fleet of Wendish ships and led him into the ambush.
Whether the above details are accurate or not, it is clear that Svein, Olaf the Swede and Eirik had ample reason to oppose Olaf Tryggvason. Olaf had taken control of Viken in south Norway, an area long under Danish overlordship. Olaf and Svein had been in England together, but Olaf had made peace while Svein kept campaigning. Svein was on friendly terms with Olaf the Swede and connected to him by marriage, so the two were natural allies. Finally, Jarl Eirik had been driven from his patrimony by Olaf Tryggvason, as arguably had his father, Jarl Hakon, whom he may have wished to avenge.
From the conflicting accounts of the sources, historians have tried to reconstruct the most likely sequence of events leading up to the battle. It is probable that Olaf Tryggvason was indeed sailing from Wendland to Norway when he was ambushed, though the kings' sagas probably play up the importance of Thyri and her marriages. While it is possible that Olaf was collecting dowry, it seems more probable that he was expecting war and seeking allies in Wendland, but met with little success. The character of Sigvaldi remains enigmatic, though there is evidence from skaldic poetry that he did indeed betray Olaf.

Time and location

All sources which date the battle agree that it took place in 1000. The oldest source to date it is the meticulous Íslendingabók, written around 1128, which specifies that it took place in the summer. Oddr Snorrason says further that the battle is "memorialized for the fallen men on the Third or Fourth Ides of September",. Mesta states that the battle occurred on 9 September, and other sources agree with either date. Since some medieval writers reckoned the end of the year in September, it is possible that the year referred to is in fact the one we know as 999.
The location of the battle cannot be identified with any certainty. According to Adam of Bremen, it took place in Oresund. Ágrip and Historia Norwegie also place it off Zealand. Theodoricus says it took place "beside the island which is called Svöldr; and it lies near Slavia". Fagrskinna speaks of "an island off the coast of Vinðland... his island is called Svölðr." Oddr Snorrason and Heimskringla agree on the island's name but do not specify its location. A stanza by Skúli Þórsteinsson speaks of "the mouth of Svolder", suggesting that Svolder could originally have been the name of a river which Norse unfamiliarity with Wendish geography turned into an island. The Danish Annales Ryenses are unique in placing the battle in the Schlei. Modern historians are divided, some locating the confrontation near the German island of Rügen while others prefer Øresund.

Composition of the fleets

The Norse sources agree that Olaf Tryggvason fought against overwhelming odds in the battle. Fagrskinna, for example, says that he had "only a small force", and that the sea around him was "carpeted with warships" The sources which specify the number of warships all agree that Olaf Tryggvason had 11 vessels but they give various numbers for the allied fleets. Most sources cite the Danish and Swedish forces as equal in size, with the exception of Rekstefja.

Source	Olaf Tryggvason	Olaf the Swede	Eirik	Svein	Allied total	Ref.
Oddr Snorrason	11	60	19	60	139
Ágrip	11	30	22	30	82
Historia Norwegie	11	30	11	30	71
Theodoricus monachus	11	-	-	-	70
Rekstefja	11	15	5	60	80

Though the sagas agree that Olaf Tryggvason had only 11 ships in the battle, some of them quote a verse by Halldórr the Unchristian saying that Olaf had 71 ships when he sailed from the south. The sagas explain the discrepancy by saying that some of the 71 ships belonged to Jarl Sigvaldi, who deserted Olaf, and that others sailed past the trap at Svolder before it was sprung.