King Harald Grafeld and his brother King Gudrod gathered together a great army in the east country, with which they set out northwards to Throndhjem (A.D. 968). When Earl Hakon heard of it he collected men, and set out to More, where he plundered.
There his father's brother, Grjotgard, had the command and defence of the country on account of Gunhild's sons, and he assembled an army by order of the kings. Earl Hakon advanced to meet him, and gave him battle; and there fell Grjotgard and two other earls, and many a man besides.
So says Einar Skalaglam: —
"The helm-crown'd Hakon, brave as stout,
Again has put his foes to rout.
The bowl runs o'er with Odin's mead, 
That fires the skald when mighty deed
Has to be sung. Earl Hakon's sword,
In single combat, as I've heard,
Three sons of earls from this one fray
To dwell with Odin drove away." 
Thereafter Earl Hakon went out to sea, and sailed outside the coast, and came to Denmark. He went to the Danish King, Harald Gormson, and was well received by him, and staid with him all winter (A.D. 969).
At that time there was also with the Danish king a man called Harald, a son of Knut Gormson, and a brother's son of King Harald. He was lately come home from a long viking cruise, on which he had gathered great riches, and therefore he was called Gold Harald.
He thought he had a good chance of coming to the Danish kingdom.
Footnotes and references:
Odin's mead, called Bodn, was the blood or mead the sons of Brage, the god of poets, drank to inspire them. — L.
To dwell with Odin, — viz. slew them. — L.