Snorri Sturluson - Heimskringla, or the Chronicle of the Kings of Norway

King Svein made a magnificent feast, to which he invited all the chiefs in his dominions; for he would give the succession-feast, or the heirship-ale, after his father Harald. A short time before, Strutharald in Skane, and Vesete in Bornholm, father to Bue the Thick and to Sigurd, had died; and King Svein sent word to the Jomsborg vikings that Earl Sigvalde and Bue, and their brothers, should come to him, and drink the funeral-ale for their fathers in the same feast the king was giving. The Jomsborg vikings came to the festival with their bravest men, forty ships of them from Vindland, and twenty ships from Skane. Great was the multitude of people assembled. The first day of the feast, before King Svein went up into his father's high-seat, he drank the bowl to his father's memory, and made the solemn vow, that before three winters were past he would go over with his army to England, and either kill King Adalrad (Ethelred), or chase him out of the country. This heirship bowl all who were at the feast drank. Thereafter for the chiefs of the Jomsborg vikings was filled and drunk the largest horn to be found, and of the strongest drink. When that bowl was emptied, all men drank Christ's health; and again the fullest measure and the strongest drink were handed to the Jomsborg vikings. The third bowl was to the memory of Saint Michael, which was drunk by all. Thereafter Earl Sigvalde emptied a remembrance bowl to his father's honour, and made the solemn vow, that before three winters came to an end he would go to Norway, and either kill Earl Hakon, or chase him out of the country. Thereupon Thorkel the Tall, his brother, made a solemn vow to follow his brother Sigvalde to Norway, and not flinch from the battle so long as Sigvalde would fight there. Then Bue the Thick vowed to follow them to Norway, and not flinch so long as the other Jomsborg vikings fought. At last Vagn Akason vowed that he would go with them to Norway, and not return until he had slain Thorkel Leira, and gone to bed to his daughter Ingebjorg without her friends' consent. Many other chiefs made solemn vows about different things. Thus was the heirship-ale drunk that day, but the next morning, when the Jomsborg vikings had slept off their drink, they thought they had spoken more than enough. They held a meeting to consult how they should proceed with their undertaking, and they determined to fit out as speedily as possible for the expedition; and without delay ships and men-at-arms were prepared, and the news spread quickly.

When Earl Eirik, the son of Hakon, who at that time was in Raumarike, heard the tidings, he immediately gathered troops, and went to the Uplands, and thence over the mountains to Throndhjem, and joined his father Earl Hakon. Thord Kolbeinson speaks of this in the lay of Eirik:—

The earls Hakon and Eirik had war-arrows split up and sent round the Throndhjem country; and despatched messages to both the Mores, North More and South More, and to Raumsdal, and also north to Naumudal and Halogaland. They summoned all the country to provide both men and ships. So it is said in Eirik's lay:

Earl Hakon set out immediately to the south, to More, to reconnoitre and gather people; and Earl Eirik gathered an army from the north to follow.

The Jomsborg vikings assembled their fleet in Limafjord, from whence they went to sea with sixty sail of vessels. When they came under the coast of Agder, they steered northwards to Rogaland with their fleet, and began to plunder when they came into the earl's territory; and so they sailed north along the coast, plundering and burning. A man, by name Geirmund, sailed in a light boat with a few men northwards to More, and there he fell in with Earl Hakon, stood before his dinner table, and told the earl the tidings of an army from Denmark having come to the south end of the land. The earl asked if he had any certainty of it. Then Geirmund stretched forth one arm, from which the hand was cut off, and said, "Here is the token that the enemy is in the land." Then the earl questioned him particularly about this army. Geirmund says it consists of Jomsborg vikings, who have killed many people, and plundered all around. "And hastily and hotly they pushed on," says he "and I expect it will not be long before they are upon you." On this the earl rode into every fjord, going in along the one side of the land and out at the other, collecting men; and thus he drove along night and day. He sent spies out upon the upper ridges, and also southwards into the Fjords; and he proceeded north to meet Eirik with his men. This appears from Eirik's lay:—

Eirik hastened southwards with his forces the shortest way he could.

Earl Sigvalde steered with his fleet northwards around Stad, and came to the land at the Herey Isles. Although the vikings fell in with the country people, the people never told the truth about what the earl was doing; and the vikings went on pillaging and laying waste. They laid to their vessels at the outer end of Hod Island, landed, plundered, and drove both men and cattle down to the ships, killing all the men able to bear arms.

As they were going back to their ships, came a bonde, walking near to Bue's troop, who said to them, "Ye are not doing like true warriors, to be driving cows and calves down to the strand, while ye should be giving chase to the bear, since ye are coming near to the bear's den."

"What says the old man?" asked some. "Can he tell us anything about Earl Hakon?"

The peasant replies, "The earl went yesterday into the Hjorundarfjord with one or two ships, certainly not more than three, and then he had no news about you."

Bue ran now with his people in all haste down to the ships, leaving all the booty behind. Bue said, "Let us avail ourselves now of this news we have got of the earl, and be the first to the victory." When they came to their ships they rode off from the land. Earl Sigvalde called to them, and asked what they were about. They replied, "The earl is in the fjord;" on which Earl Sigvalde with the whole fleet set off, and rowed north about the island Hod.

The earls Hakon and Eirik lay in Halkelsvik, where all their forces were assembled. They had 150 ships, and they had heard that the Jomsborg vikings had come in from sea, and lay at the island Hod; and they, in consequence, rowed out to seek them. When they reached a place called Hjorungavag they met each other, and both sides drew up their ships in line for an attack. Earl Sigvalde's banner was displayed in the midst of his army, and right against it Earl Hakon arranged his force for attack. Earl Sigvalde himself had 20 ships, but Earl Hakon had 60. In Earl's army were these chiefs,—Thorer Hjort from Halogaland, and Styrkar from Gimsar. In the wing of the opposite array of the Jomsborg vikings was Bue the Thick, and his brother Sigurd, with 20 ships. Against him Earl Eirik laid himself with 60 ships; and with him were these chiefs,—Gudbrand Hvite from the Uplands, and Thorkel Leira from Viken. In the other wing of the Jomsborg vikings' array was Vagn Akason with 20 ships; and against him stood Svein the son of Hakon, in whose division was Skegge of Yrjar at Uphaug, and Rognvald of Aervik at Stad, with 60 ships. It is told in the Eirik's lay thus:—

Eyvind Skaldaspiller says also in the "Haleygja-tal":—

Then the fleets came together, and one of the sharpest of conflicts began. Many fell on both sides, but the most by far on Hakon's side; for the Jomsborg vikings fought desperately, sharply, and murderously, and shot right through the shields. So many spears were thrown against Earl Hakon that his armour was altogether split asunder, and he threw it off. So says Tind Halkelson:—